merge revision(s) 33379:
* gc.c (rb_gc_set_params): output GC parameter change messages only if -w/-v options are specified. these messages are output to stderr, not to stdout. [ruby-core:39795] [Bug #5380] * test/ruby/test_gc.rb (test_gc_parameter): add test for it.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33433 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 33379:
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33433 b2dd03c8-39d4-4d8f-98ff-823fe69b080e