merge revision(s) 51445: [Backport #11404] [Backport #11481]
envutil.rb: -w for assert_separately * test/lib/envutil.rb (assert_separately): always add -w option
for warnings.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52661 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 51445: [Backport #11404] [Backport #11481]
for warnings.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52661 b2dd03c8-39d4-4d8f-98ff-823fe69b080e