spellcheck bugfixes: don't offer the goal string as a suggestion

spellcheck bugfixes: don't offer the goal string as a suggestion

gcc/cp/ChangeLog:
	PR c++/77922
	* name-lookup.c (lookup_name_fuzzy): Filter out reserved words
	that were filtered out by init_reswords.

gcc/ChangeLog:
	PR c++/72774
	PR c++/72786
	PR c++/77922
	PR c++/78313
	* spellcheck.c (selftest::test_find_closest_string): Verify that
	we don't offer the goal string as a suggestion.
	* spellcheck.h (best_match::get_best_meaningful_candidate): Don't
	offer the goal string as a suggestion.

gcc/testsuite/ChangeLog:
	PR c++/72774
	PR c++/72786
	PR c++/77922
	PR c++/78313
	* g++.dg/spellcheck-c++-11-keyword.C: New test case.
	* g++.dg/spellcheck-macro-ordering.C: New test case.
	* g++.dg/spellcheck-pr78313.C: New test case.

From-SVN: r242965