vars must be declared at the start of a block
parser_dump supports NODE_REGEX.
Remove needless comment
update String#gsub test
s must not be freed, removed space in exc msg
Merge pull request #857 from mattn/remove_comment

Remove needless comment
Merge pull request #853 from cremno/pluggable-regex-msvc-fix

MSVC: vars must be declared at the start of a block
Merge pull request #855 from masamitsu-murase/support_parser_dump_for_regexp_literal

parser_dump supports NODE_REGEX.
Merge pull request #860 from iij/pr-gsub-test

update String#gsub test
Merge pull request #861 from cremno/regexp-parser-bugfix

regexp parsing bug if unknown option is used
declare local variable at the start of a block in generated gem_test.c
Merge pull request #863 from nkshigeru/gemtest_for_vc

declare local variable at the start of a block in generated gem_test.c