Run "make update-copyright" and then...
* gnulib: Update to latest with copyright year adjusted.
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Likewise.
* doc/grep.in.1: Use "-" in copyright year ranges, not \en.
fgrep converted to lowercase, whereas the regex code converted
to uppercase. The resulting behaviors don't agree in offbeat
cases like Greek sigmas and Turkish Is. Fix this by changing
fgrep to agree with the regex code.
* src/kwsearch.c (Fcompile, Fexecute):
* src/searchutils.c (kwsinit, mbtoupper):
Convert to uppercase, not to lowercase, for compatibility with
plain 'grep'.
* src/search.h, src/searchutils.c (mbtoupper):
Rename from mbtolower, since it now converts to uppercase.
All uses changed.
* tests/case-fold-titlecase: Add tests for this.
The DFA code and the regex code didn't use the same semantics for
case-folding. The regex code says that the data char d matches
the pattern char p if uc (d) == uc (p). POSIX is unclear in this
area; the simplest fix for now is to change the DFA code to agree
with the regex code. See <http://bugs.gnu.org/16919>.
* src/dfa.c (static_assert): New macro, if not already defined.
(setbit_case_fold_c): Assume MB_CUR_MAX is 1 and that case_fold
is nonzero; all callers changed.
(setbit_case_fold_c, parse_bracket_exp, lex, atom):
Case-fold like the regex code does.
(lonesome_lower): New constant.
(case_folded_counterparts): New function.
(parse_bracket_exp): Prefer plain setbit when case-folding is
not needed.
* src/dfa.h (CASE_FOLDED_BUFSIZE): New constant.
(case_folded_counterparts): New function decl.
* src/main.c (trivial_case_ignore): Case-fold like the regex code does.
(main): Try to improve comment re trivial_case_ignore.
* tests/case-fold-titlecase: Add lots more test cases.
* NEWS: Document this.
* src/dfa.c (setbit_wc): Simplify.
(setbit_c): Remove; no longer used.
(setbit_case_fold_c, parse_bracket_exp, atom):
Don't mishandle titlecase. For 'atom', this removes the need for
the refactoring of Bug#16729.
(lex): Use the slower approach only for letters that have a
differing case.
* tests/case-fold-titlecase: New file.
* tests/Makefile.am (TESTS): Add it.
