merge revision(s) 44358,44359,44360,44363: [Backport #9275]

        hash.c: reword

        * hash.c (HAS_EXTRA_STATES, rb_hash_reject): use words "extra states".
        * hash.c (HAS_EXTRA_STATES): warn extra states only when something
          differ.  [ruby-core:59254] [Bug #9275]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44683 b2dd03c8-39d4-4d8f-98ff-823fe69b080e