merge revision(s) 50793,51120: [Backport #11162]
* lib/cmath.rb: [DOC] Add docs [ci skip][Fix GH-909][Bug #11162] Patch provided by @davydovanton
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@51121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by usa (Usaku NAKAMURA) almost 9 years ago
merge revision(s) 50793,51120: [Backport #11162]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@51121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e