mirror of
https://github.com/python/cpython.git
synced 2024-12-15 04:44:47 +08:00
Merge with 3.3
This commit is contained in:
Terry Jan Reedy
commit
9559243fc8
@ -1,18 +1,19 @@
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# Extension to format a paragraph
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"""Extension to format a paragraph or selection to a max width.
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# Does basic, standard text formatting, and also understands Python
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# comment blocks. Thus, for editing Python source code, this
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# extension is really only suitable for reformatting these comment
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# blocks or triple-quoted strings.
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Does basic, standard text formatting, and also understands Python
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comment blocks. Thus, for editing Python source code, this
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extension is really only suitable for reformatting these comment
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blocks or triple-quoted strings.
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# Known problems with comment reformatting:
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# * If there is a selection marked, and the first line of the
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# selection is not complete, the block will probably not be detected
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# as comments, and will have the normal "text formatting" rules
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# applied.
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# * If a comment block has leading whitespace that mixes tabs and
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# spaces, they will not be considered part of the same block.
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# * Fancy comments, like this bulleted list, arent handled :-)
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Known problems with comment reformatting:
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* If there is a selection marked, and the first line of the
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selection is not complete, the block will probably not be detected
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as comments, and will have the normal "text formatting" rules
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applied.
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* If a comment block has leading whitespace that mixes tabs and
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spaces, they will not be considered part of the same block.
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* Fancy comments, like this bulleted list, aren't handled :-)
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"""
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import re
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from idlelib.configHandler import idleConf
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@ -32,42 +33,31 @@ class FormatParagraph:
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self.editwin = None
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def format_paragraph_event(self, event):
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maxformatwidth = int(idleConf.GetOption('main', 'FormatParagraph',
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'paragraph', type='int'))
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"""Formats paragraph to a max width specified in idleConf.
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If text is selected, format_paragraph_event will start breaking lines
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at the max width, starting from the beginning selection.
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If no text is selected, format_paragraph_event uses the current
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cursor location to determine the paragraph (lines of text surrounded
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by blank lines) and formats it.
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"""
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maxformatwidth = idleConf.GetOption(
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'main', 'FormatParagraph', 'paragraph', type='int')
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text = self.editwin.text
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first, last = self.editwin.get_selection_indices()
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if first and last:
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data = text.get(first, last)
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comment_header = ''
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comment_header = get_comment_header(data)
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else:
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first, last, comment_header, data = \
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find_paragraph(text, text.index("insert"))
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if comment_header:
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# Reformat the comment lines - convert to text sans header.
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lines = data.split("\n")
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lines = map(lambda st, l=len(comment_header): st[l:], lines)
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data = "\n".join(lines)
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# Reformat to maxformatwidth chars or a 20 char width,
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# whichever is greater.
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format_width = max(maxformatwidth - len(comment_header), 20)
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newdata = reformat_paragraph(data, format_width)
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# re-split and re-insert the comment header.
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newdata = newdata.split("\n")
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# If the block ends in a \n, we dont want the comment
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# prefix inserted after it. (Im not sure it makes sense to
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# reformat a comment block that isnt made of complete
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# lines, but whatever!) Can't think of a clean solution,
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# so we hack away
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block_suffix = ""
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if not newdata[-1]:
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block_suffix = "\n"
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newdata = newdata[:-1]
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builder = lambda item, prefix=comment_header: prefix+item
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newdata = '\n'.join(map(builder, newdata)) + block_suffix
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newdata = reformat_comment(data, maxformatwidth, comment_header)
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else:
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# Just a normal text format
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newdata = reformat_paragraph(data, maxformatwidth)
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text.tag_remove("sel", "1.0", "end")
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if newdata != data:
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text.mark_set("insert", first)
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text.undo_block_start()
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@ -80,31 +70,44 @@ class FormatParagraph:
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return "break"
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def find_paragraph(text, mark):
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"""Returns the start/stop indices enclosing the paragraph that mark is in.
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Also returns the comment format string, if any, and paragraph of text
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between the start/stop indices.
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"""
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lineno, col = map(int, mark.split("."))
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line = text.get("%d.0" % lineno, "%d.0 lineend" % lineno)
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line = text.get("%d.0" % lineno, "%d.end" % lineno)
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# Look for start of next paragraph if the index passed in is a blank line
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while text.compare("%d.0" % lineno, "<", "end") and is_all_white(line):
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lineno = lineno + 1
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line = text.get("%d.0" % lineno, "%d.0 lineend" % lineno)
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line = text.get("%d.0" % lineno, "%d.end" % lineno)
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first_lineno = lineno
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comment_header = get_comment_header(line)
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comment_header_len = len(comment_header)
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# Once start line found, search for end of paragraph (a blank line)
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while get_comment_header(line)==comment_header and \
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not is_all_white(line[comment_header_len:]):
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lineno = lineno + 1
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line = text.get("%d.0" % lineno, "%d.0 lineend" % lineno)
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line = text.get("%d.0" % lineno, "%d.end" % lineno)
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last = "%d.0" % lineno
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# Search back to beginning of paragraph
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# Search back to beginning of paragraph (first blank line before)
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lineno = first_lineno - 1
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line = text.get("%d.0" % lineno, "%d.0 lineend" % lineno)
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line = text.get("%d.0" % lineno, "%d.end" % lineno)
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while lineno > 0 and \
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get_comment_header(line)==comment_header and \
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not is_all_white(line[comment_header_len:]):
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lineno = lineno - 1
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line = text.get("%d.0" % lineno, "%d.0 lineend" % lineno)
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line = text.get("%d.0" % lineno, "%d.end" % lineno)
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first = "%d.0" % (lineno+1)
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return first, last, comment_header, text.get(first, last)
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# This should perhaps be replaced with textwrap.wrap
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def reformat_paragraph(data, limit):
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"""Return data reformatted to specified width (limit)."""
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lines = data.split("\n")
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i = 0
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n = len(lines)
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@ -139,13 +142,50 @@ def reformat_paragraph(data, limit):
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new.extend(lines[i:])
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return "\n".join(new)
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def reformat_comment(data, limit, comment_header):
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"""Return data reformatted to specified width with comment header."""
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# Remove header from the comment lines
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lc = len(comment_header)
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data = "\n".join(line[lc:] for line in data.split("\n"))
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# Reformat to maxformatwidth chars or a 20 char width,
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# whichever is greater.
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format_width = max(limit - len(comment_header), 20)
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newdata = reformat_paragraph(data, format_width)
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# re-split and re-insert the comment header.
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newdata = newdata.split("\n")
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# If the block ends in a \n, we dont want the comment prefix
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# inserted after it. (Im not sure it makes sense to reformat a
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# comment block that is not made of complete lines, but whatever!)
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# Can't think of a clean solution, so we hack away
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block_suffix = ""
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if not newdata[-1]:
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block_suffix = "\n"
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newdata = newdata[:-1]
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return '\n'.join(comment_header+line for line in newdata) + block_suffix
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def is_all_white(line):
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"""Return True if line is empty or all whitespace."""
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return re.match(r"^\s*$", line) is not None
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def get_indent(line):
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return re.match(r"^(\s*)", line).group()
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"""Return the initial space or tab indent of line."""
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return re.match(r"^([ \t]*)", line).group()
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def get_comment_header(line):
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m = re.match(r"^(\s*#*)", line)
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"""Return string with leading whitespace and '#' from line or ''.
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A null return indicates that the line is not a comment line. A non-
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null return, such as ' #', will be used to find the other lines of
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a comment block with the same indent.
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"""
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m = re.match(r"^([ \t]*#*)", line)
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if m is None: return ""
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return m.group(1)
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if __name__ == "__main__":
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from test import support; support.use_resources = ['gui']
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import unittest
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unittest.main('idlelib.idle_test.test_formatparagraph',
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verbosity=2, exit=False)
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374
Lib/idlelib/idle_test/test_formatparagraph.py
Normal file
374
Lib/idlelib/idle_test/test_formatparagraph.py
Normal file
@ -0,0 +1,374 @@
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# Test the functions and main class method of FormatParagraph.py
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import unittest
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from idlelib import FormatParagraph as fp
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from idlelib.EditorWindow import EditorWindow
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from tkinter import Tk, Text, TclError
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from test.support import requires
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class Is_Get_Test(unittest.TestCase):
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"""Test the is_ and get_ functions"""
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test_comment = '# This is a comment'
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test_nocomment = 'This is not a comment'
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trailingws_comment = '# This is a comment '
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leadingws_comment = ' # This is a comment'
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leadingws_nocomment = ' This is not a comment'
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def test_is_all_white(self):
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self.assertTrue(fp.is_all_white(''))
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self.assertTrue(fp.is_all_white('\t\n\r\f\v'))
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self.assertFalse(fp.is_all_white(self.test_comment))
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def test_get_indent(self):
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Equal = self.assertEqual
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Equal(fp.get_indent(self.test_comment), '')
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Equal(fp.get_indent(self.trailingws_comment), '')
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Equal(fp.get_indent(self.leadingws_comment), ' ')
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Equal(fp.get_indent(self.leadingws_nocomment), ' ')
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def test_get_comment_header(self):
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Equal = self.assertEqual
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# Test comment strings
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Equal(fp.get_comment_header(self.test_comment), '#')
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Equal(fp.get_comment_header(self.trailingws_comment), '#')
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Equal(fp.get_comment_header(self.leadingws_comment), ' #')
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# Test non-comment strings
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Equal(fp.get_comment_header(self.leadingws_nocomment), ' ')
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Equal(fp.get_comment_header(self.test_nocomment), '')
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class FindTest(unittest.TestCase):
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"""Test the find_paragraph function in FormatParagraph.
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Using the runcase() function, find_paragraph() is called with 'mark' set at
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multiple indexes before and inside the test paragraph.
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It appears that code with the same indentation as a quoted string is grouped
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as part of the same paragraph, which is probably incorrect behavior.
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"""
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@classmethod
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def setUpClass(cls):
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from idlelib.idle_test.mock_tk import Text
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cls.text = Text()
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def runcase(self, inserttext, stopline, expected):
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# Check that find_paragraph returns the expected paragraph when
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# the mark index is set to beginning, middle, end of each line
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# up to but not including the stop line
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text = self.text
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text.insert('1.0', inserttext)
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for line in range(1, stopline):
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linelength = int(text.index("%d.end" % line).split('.')[1])
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for col in (0, linelength//2, linelength):
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tempindex = "%d.%d" % (line, col)
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self.assertEqual(fp.find_paragraph(text, tempindex), expected)
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text.delete('1.0', 'end')
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def test_find_comment(self):
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comment = (
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"# Comment block with no blank lines before\n"
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"# Comment line\n"
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"\n")
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self.runcase(comment, 3, ('1.0', '3.0', '#', comment[0:58]))
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comment = (
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"\n"
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"# Comment block with whitespace line before and after\n"
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"# Comment line\n"
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"\n")
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self.runcase(comment, 4, ('2.0', '4.0', '#', comment[1:70]))
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comment = (
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"\n"
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" # Indented comment block with whitespace before and after\n"
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" # Comment line\n"
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"\n")
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self.runcase(comment, 4, ('2.0', '4.0', ' #', comment[1:82]))
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comment = (
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"\n"
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"# Single line comment\n"
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"\n")
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self.runcase(comment, 3, ('2.0', '3.0', '#', comment[1:23]))
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comment = (
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"\n"
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" # Single line comment with leading whitespace\n"
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"\n")
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self.runcase(comment, 3, ('2.0', '3.0', ' #', comment[1:51]))
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comment = (
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"\n"
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"# Comment immediately followed by code\n"
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"x = 42\n"
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"\n")
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self.runcase(comment, 3, ('2.0', '3.0', '#', comment[1:40]))
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comment = (
|
||||
"\n"
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" # Indented comment immediately followed by code\n"
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||||
"x = 42\n"
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"\n")
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self.runcase(comment, 3, ('2.0', '3.0', ' #', comment[1:53]))
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||||
|
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comment = (
|
||||
"\n"
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"# Comment immediately followed by indented code\n"
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" x = 42\n"
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||||
"\n")
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self.runcase(comment, 3, ('2.0', '3.0', '#', comment[1:49]))
|
||||
|
||||
def test_find_paragraph(self):
|
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teststring = (
|
||||
'"""String with no blank lines before\n'
|
||||
'String line\n'
|
||||
'"""\n'
|
||||
'\n')
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||||
self.runcase(teststring, 4, ('1.0', '4.0', '', teststring[0:53]))
|
||||
|
||||
teststring = (
|
||||
"\n"
|
||||
'"""String with whitespace line before and after\n'
|
||||
'String line.\n'
|
||||
'"""\n'
|
||||
'\n')
|
||||
self.runcase(teststring, 5, ('2.0', '5.0', '', teststring[1:66]))
|
||||
|
||||
teststring = (
|
||||
'\n'
|
||||
' """Indented string with whitespace before and after\n'
|
||||
' Comment string.\n'
|
||||
' """\n'
|
||||
'\n')
|
||||
self.runcase(teststring, 5, ('2.0', '5.0', ' ', teststring[1:85]))
|
||||
|
||||
teststring = (
|
||||
'\n'
|
||||
'"""Single line string."""\n'
|
||||
'\n')
|
||||
self.runcase(teststring, 3, ('2.0', '3.0', '', teststring[1:27]))
|
||||
|
||||
teststring = (
|
||||
'\n'
|
||||
' """Single line string with leading whitespace."""\n'
|
||||
'\n')
|
||||
self.runcase(teststring, 3, ('2.0', '3.0', ' ', teststring[1:55]))
|
||||
|
||||
|
||||
class ReformatFunctionTest(unittest.TestCase):
|
||||
"""Test the reformat_paragraph function without the editor window."""
|
||||
|
||||
def test_reformat_paragrah(self):
|
||||
Equal = self.assertEqual
|
||||
reform = fp.reformat_paragraph
|
||||
hw = "O hello world"
|
||||
Equal(reform(' ', 1), ' ')
|
||||
Equal(reform("Hello world", 20), "Hello world")
|
||||
|
||||
# Test without leading newline
|
||||
Equal(reform(hw, 1), "O\nhello\nworld")
|
||||
Equal(reform(hw, 6), "O\nhello\nworld")
|
||||
Equal(reform(hw, 7), "O hello\nworld")
|
||||
Equal(reform(hw, 12), "O hello\nworld")
|
||||
Equal(reform(hw, 13), "O hello world")
|
||||
|
||||
# Test with leading newline
|
||||
hw = "\nO hello world"
|
||||
Equal(reform(hw, 1), "\nO\nhello\nworld")
|
||||
Equal(reform(hw, 6), "\nO\nhello\nworld")
|
||||
Equal(reform(hw, 7), "\nO hello\nworld")
|
||||
Equal(reform(hw, 12), "\nO hello\nworld")
|
||||
Equal(reform(hw, 13), "\nO hello world")
|
||||
|
||||
|
||||
class ReformatCommentTest(unittest.TestCase):
|
||||
"""Test the reformat_comment function without the editor window."""
|
||||
|
||||
def test_reformat_comment(self):
|
||||
Equal = self.assertEqual
|
||||
|
||||
# reformat_comment formats to a minimum of 20 characters
|
||||
test_string = (
|
||||
" \"\"\"this is a test of a reformat for a triple quoted string"
|
||||
" will it reformat to less than 70 characters for me?\"\"\"")
|
||||
result = fp.reformat_comment(test_string, 70, " ")
|
||||
expected = (
|
||||
" \"\"\"this is a test of a reformat for a triple quoted string will it\n"
|
||||
" reformat to less than 70 characters for me?\"\"\"")
|
||||
Equal(result, expected)
|
||||
|
||||
test_comment = (
|
||||
"# this is a test of a reformat for a triple quoted string will "
|
||||
"it reformat to less than 70 characters for me?")
|
||||
result = fp.reformat_comment(test_comment, 70, "#")
|
||||
expected = (
|
||||
"# this is a test of a reformat for a triple quoted string will it\n"
|
||||
"# reformat to less than 70 characters for me?")
|
||||
Equal(result, expected)
|
||||
|
||||
|
||||
class FormatClassTest(unittest.TestCase):
|
||||
def test_init_close(self):
|
||||
instance = fp.FormatParagraph('editor')
|
||||
self.assertEqual(instance.editwin, 'editor')
|
||||
instance.close()
|
||||
self.assertEqual(instance.editwin, None)
|
||||
|
||||
|
||||
# For testing format_paragraph_event, Initialize FormatParagraph with
|
||||
# a mock Editor with .text and .get_selection_indices. The text must
|
||||
# be a Text wrapper that adds two methods
|
||||
|
||||
# A real EditorWindow creates unneeded, time-consuming baggage and
|
||||
# sometimes emits shutdown warnings like this:
|
||||
# "warning: callback failed in WindowList <class '_tkinter.TclError'>
|
||||
# : invalid command name ".55131368.windows".
|
||||
# Calling EditorWindow._close in tearDownClass prevents this but causes
|
||||
# other problems (windows left open).
|
||||
|
||||
class TextWrapper:
|
||||
def __init__(self, master):
|
||||
self.text = Text(master=master)
|
||||
def __getattr__(self, name):
|
||||
return getattr(self.text, name)
|
||||
def undo_block_start(self): pass
|
||||
def undo_block_stop(self): pass
|
||||
|
||||
class Editor:
|
||||
def __init__(self, root):
|
||||
self.text = TextWrapper(root)
|
||||
get_selection_indices = EditorWindow. get_selection_indices
|
||||
|
||||
class FormatEventTest(unittest.TestCase):
|
||||
"""Test the formatting of text inside a Text widget.
|
||||
|
||||
This is done with FormatParagraph.format.paragraph_event,
|
||||
which calls funtions in the module as appropriate.
|
||||
"""
|
||||
test_string = (
|
||||
" '''this is a test of a reformat for a triple "
|
||||
"quoted string will it reformat to less than 70 "
|
||||
"characters for me?'''\n")
|
||||
multiline_test_string = (
|
||||
" '''The first line is under the max width.\n"
|
||||
" The second line's length is way over the max width. It goes "
|
||||
"on and on until it is over 100 characters long.\n"
|
||||
" Same thing with the third line. It is also way over the max "
|
||||
"width, but FormatParagraph will fix it.\n"
|
||||
" '''\n")
|
||||
multiline_test_comment = (
|
||||
"# The first line is under the max width.\n"
|
||||
"# The second line's length is way over the max width. It goes on "
|
||||
"and on until it is over 100 characters long.\n"
|
||||
"# Same thing with the third line. It is also way over the max "
|
||||
"width, but FormatParagraph will fix it.\n"
|
||||
"# The fourth line is short like the first line.")
|
||||
|
||||
@classmethod
|
||||
def setUpClass(cls):
|
||||
requires('gui')
|
||||
cls.root = Tk()
|
||||
editor = Editor(root=cls.root)
|
||||
cls.text = editor.text.text # Test code does not need the wrapper.
|
||||
cls.formatter = fp.FormatParagraph(editor).format_paragraph_event
|
||||
# Sets the insert mark just after the re-wrapped and inserted text.
|
||||
|
||||
@classmethod
|
||||
def tearDownClass(cls):
|
||||
cls.root.destroy()
|
||||
|
||||
def test_short_line(self):
|
||||
self.text.insert('1.0', "Short line\n")
|
||||
self.formatter("Dummy")
|
||||
self.assertEqual(self.text.get('1.0', 'insert'), "Short line\n" )
|
||||
self.text.delete('1.0', 'end')
|
||||
|
||||
def test_long_line(self):
|
||||
text = self.text
|
||||
|
||||
# Set cursor ('insert' mark) to '1.0', within text.
|
||||
text.insert('1.0', self.test_string)
|
||||
text.mark_set('insert', '1.0')
|
||||
self.formatter('ParameterDoesNothing')
|
||||
result = text.get('1.0', 'insert')
|
||||
# find function includes \n
|
||||
expected = (
|
||||
" '''this is a test of a reformat for a triple quoted string will it\n"
|
||||
" reformat to less than 70 characters for me?'''\n") # yes
|
||||
self.assertEqual(result, expected)
|
||||
text.delete('1.0', 'end')
|
||||
|
||||
# Select from 1.11 to line end.
|
||||
text.insert('1.0', self.test_string)
|
||||
text.tag_add('sel', '1.11', '1.end')
|
||||
self.formatter('ParameterDoesNothing')
|
||||
result = text.get('1.0', 'insert')
|
||||
# selection excludes \n
|
||||
expected = (
|
||||
" '''this is a test of a reformat for a triple quoted string will it reformat\n"
|
||||
" to less than 70 characters for me?'''") # no
|
||||
self.assertEqual(result, expected)
|
||||
text.delete('1.0', 'end')
|
||||
|
||||
def test_multiple_lines(self):
|
||||
text = self.text
|
||||
# Select 2 long lines.
|
||||
text.insert('1.0', self.multiline_test_string)
|
||||
text.tag_add('sel', '2.0', '4.0')
|
||||
self.formatter('ParameterDoesNothing')
|
||||
result = text.get('2.0', 'insert')
|
||||
expected = (
|
||||
" The second line's length is way over the max width. It goes on and\n"
|
||||
" on until it is over 100 characters long. Same thing with the third\n"
|
||||
" line. It is also way over the max width, but FormatParagraph will\n"
|
||||
" fix it.\n")
|
||||
self.assertEqual(result, expected)
|
||||
text.delete('1.0', 'end')
|
||||
|
||||
def test_comment_block(self):
|
||||
text = self.text
|
||||
|
||||
# Set cursor ('insert') to '1.0', within block.
|
||||
text.insert('1.0', self.multiline_test_comment)
|
||||
self.formatter('ParameterDoesNothing')
|
||||
result = text.get('1.0', 'insert')
|
||||
expected = (
|
||||
"# The first line is under the max width. The second line's length is\n"
|
||||
"# way over the max width. It goes on and on until it is over 100\n"
|
||||
"# characters long. Same thing with the third line. It is also way over\n"
|
||||
"# the max width, but FormatParagraph will fix it. The fourth line is\n"
|
||||
"# short like the first line.\n")
|
||||
self.assertEqual(result, expected)
|
||||
text.delete('1.0', 'end')
|
||||
|
||||
# Select line 2, verify line 1 unaffected.
|
||||
text.insert('1.0', self.multiline_test_comment)
|
||||
text.tag_add('sel', '2.0', '3.0')
|
||||
self.formatter('ParameterDoesNothing')
|
||||
result = text.get('1.0', 'insert')
|
||||
expected = (
|
||||
"# The first line is under the max width.\n"
|
||||
"# The second line's length is way over the max width. It goes on and\n"
|
||||
"# on until it is over 100 characters long.\n")
|
||||
self.assertEqual(result, expected)
|
||||
text.delete('1.0', 'end')
|
||||
|
||||
# The following block worked with EditorWindow but fails with the mock.
|
||||
# Lines 2 and 3 get pasted together even though the previous block left
|
||||
# the previous line alone. More investigation is needed.
|
||||
## # Select lines 3 and 4
|
||||
## text.insert('1.0', self.multiline_test_comment)
|
||||
## text.tag_add('sel', '3.0', '5.0')
|
||||
## self.formatter('ParameterDoesNothing')
|
||||
## result = text.get('3.0', 'insert')
|
||||
## expected = (
|
||||
##"# Same thing with the third line. It is also way over the max width,\n"
|
||||
##"# but FormatParagraph will fix it. The fourth line is short like the\n"
|
||||
##"# first line.\n")
|
||||
## self.assertEqual(result, expected)
|
||||
## text.delete('1.0', 'end')
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
unittest.main(verbosity=2, exit=2)
|
||||
@ -770,6 +770,9 @@ C-API
|
||||
IDLE
|
||||
----
|
||||
|
||||
- Issue #18226: Add docstrings and unittests for FormatParagraph.py.
|
||||
Original patches by Todd Rovito and Phil Webster.
|
||||
|
||||
- Issue #18279: Format - Strip trailing whitespace no longer marks a file as
|
||||
changed when it has not been changed. This fix followed the addition of a
|
||||
test file originally written by Phil Webster (the issue's main goal).
|
||||
|
||||
Loading…
Reference in New Issue
Block a user