merge revision(s) 53022: [Backport #11764]
* ext/tk/lib/multi-tk.rb: fix typos. [Bug #11764][ruby-core:71800]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@53921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 53022: [Backport #11764]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@53921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e