merge revision(s) 53668: [Backport #12759]
* lib/tempfile.rb (Tempfile#initialize): [DOC] the first parameter `basename` is optional and defaulted to an empty string since [GH-523]. [Fix GH-1225]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 53668: [Backport #12759]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e