[ruby/psych] Strip trailing spaces [ci skip]

https://github.com/ruby/psych/commit/e07b16ad8b
2023-01-06 15:36:30 +09:00 · 2023-01-06 15:36:30 +09:00 · dcf63b58cf
--- a/ext/psych/psych.gemspec
+++ b/ext/psych/psych.gemspec
@ -62,7 +62,7 @@ DESCRIPTION
    s.extensions = ["ext/psych/extconf.rb"]
    s.add_dependency 'stringio'
  end
-  
+
  s.metadata['msys2_mingw_dependencies'] = 'libyaml libyaml-devel'
 end