maint: fix recent syntax-check failures

* .gitignore: Add new headers from gnulib.
* src/basenc.c: Adjust line length due to replacement
of 'verify' with 'static_assert'.
* src/od.c: Likewise.

.gitignore

@@ -48,6 +48,7 @@
 /lib/alloca.h
 /lib/arg-nonnull.h
 /lib/arpa/inet.h
+/lib/assert.h
 /lib/byteswap.h
 /lib/c++defs.h
 /lib/charset.alias
@@ -98,6 +99,7 @@
 /lib/stdalign.h
 /lib/stdarg.h
 /lib/stdbool.h
+/lib/stdckdint.h
 /lib/stddef.h
 /lib/stdint.h
 /lib/stdio.h

src/basenc.c

@@ -215,8 +215,8 @@ static_assert (DEC_BLOCKSIZE % 12 == 0); /* Complete encoded blocks are used.  *
 /* Note that increasing this may decrease performance if --ignore-garbage
    is used, because of the memmove operation below.  */
 # define DEC_BLOCKSIZE (4200)
-static_assert (DEC_BLOCKSIZE % 40 == 0); /* complete encoded blocks for base32 */
-static_assert (DEC_BLOCKSIZE % 12 == 0); /* complete encoded blocks for base64 */
+static_assert (DEC_BLOCKSIZE % 40 == 0); /* complete encoded blocks for base32*/
+static_assert (DEC_BLOCKSIZE % 12 == 0); /* complete encoded blocks for base64*/
 
 static int (*base_length) (int i);
 static bool (*isbase) (char ch);

src/od.c

@@ -139,7 +139,8 @@ static unsigned int const bytes_to_hex_digits[] =
 /* It'll be a while before we see integral types wider than 16 bytes,
    but if/when it happens, this check will catch it.  Without this check,
    a wider type would provoke a buffer overrun.  */
-static_assert (MAX_INTEGRAL_TYPE_SIZE < ARRAY_CARDINALITY (bytes_to_hex_digits));
+static_assert (MAX_INTEGRAL_TYPE_SIZE
+               < ARRAY_CARDINALITY (bytes_to_hex_digits));
 
 /* Make sure the other arrays have the same length.  */
 static_assert (sizeof bytes_to_oct_digits == sizeof bytes_to_signed_dec_digits);