Ruby

• lib/mkmf.rb (try_link): rdoc
  (try_compile): ditto
  (try_cpp): ditto
  (try_func): ditto
  (try_var): ditto
  (try_run): ditto
  (egrep_cpp): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29301 b2dd03c8-39d4-4d8f-98ff-823fe69b080e