* gc.c: remove "Sunny" terminology.
  "Sunny" doesn't mean antonym of "Shady" (questionable, doubtful, etc).
  Instead of "Suuny", use "non-shady" or "normal".



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e