error.c: print default RS
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57377 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
error.c: print default RS
string with a newline. [Feature #12944]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57377 b2dd03c8-39d4-4d8f-98ff-823fe69b080e