Ruby » Ruby master

prepend: fix ancestors order

• class.c (rb_mod_ancestors): fix ancestors order.
  [ruby-core:45919][Bug #6658] [ruby-dev:45861][Bug #6659]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e