merge revision(s) 56374: [Backport #12822]
* lib/logger.rb (Logger::Period#next_rotate_time): fix monthly log rotate when DST is applied during a month of 31 days. [Fix GH-1458]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@56504 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 56374: [Backport #12822]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@56504 b2dd03c8-39d4-4d8f-98ff-823fe69b080e