CASEMAP_DEBUG [ci skip]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55483 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
CASEMAP_DEBUG [ci skip]
debug/tuning messages under a preprocessor condition,
CASEMAP_DEBUG.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55483 b2dd03c8-39d4-4d8f-98ff-823fe69b080e