Issue #558 Contents#update returns a RepoCommit
Merge branch 'master' into 558
Issue #558 Added unit tests for checking returned RepoCommit
Merge pull request #596 from carlosmiranda/558

#596: pull request Issue #558 Contents#update method now returns RepoCommit
removed puzzle
fixed typo
Merge pull request #623 from svarovski/issue-506

#623: pull request removed puzzle for issue #506