#none documentation updated [ci skip]
Use annotated git tags for release task
Merge pull request #13340 from akshay-vishnoi/typo

#none documentation updated [ci skip]
change to DateTime.civil_from_format from DateTime.civil_from_fromat in changelog [ci skip]
Merge pull request #13367 from abhishekjain16/new_branch

change to DateTime.civil_from_format from DateTime.civil_from_fromat in ...

[ci skip]
Added a link to the Module#concerning docs from the 4.1 release notes [ci skip]
Fix typo [ci skip]
Merge pull request #13373 from sbagdat/patch-1

Fix typo [ci skip]
duplication removed(DRY)
Merge pull request #13370 from abhishekjain16/refactor_rails

duplication removed(DRY)
Fix nil assignment to polymorphic belongs_to

Assigning nil to a polymorphic belongs_to would nullify its _id field by
not its _type field.

Fixes failing test from c141dfc838a5dca9f197814410fa5d44c143129c.
Regression from 1678e959e973de32287b65c52ebc6cce87148951.
document how to access mail previews. [ci skip]

/cc @pixeltrix
Always point to latest rbx and jruby in travis
make clear that config/secrets.yml passes through ERB and therefore supports ENV