merge revision(s) 50406,50407: [Backport #11075]
* rational.c: Added documentation for rational literal. [Bug #11075][fix GH-885][ci skip] Patch by @shishir127
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50627 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 50406,50407: [Backport #11075]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50627 b2dd03c8-39d4-4d8f-98ff-823fe69b080e