rl_char_is_quoted_p
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56326 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
rl_char_is_quoted_p
support rl_char_is_quoted_p. [Feature #12659]
ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56326 b2dd03c8-39d4-4d8f-98ff-823fe69b080e