Typo by @windwiny [Fixes GH-295]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40435 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
parse.y: disallow $-

* parse.y (parser_yylex): disallow $- without following identifier
  character.  [ruby-talk:406969]
* parse.y (is_special_global_name): mere $- is not a valid global
  variable name.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40436 b2dd03c8-39d4-4d8f-98ff-823fe69b080e