* proc.c (rb_mod_define_method): now they return the symbols of the
  defined methods, not the methods/procs themselves.
  [ruby-dev:42151] [Feature #3753]

* NEWS: documents about above change and def-expr (see r42337).

* test/ruby/test_module.rb: tests about above change.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42551 b2dd03c8-39d4-4d8f-98ff-823fe69b080e