InputGitTreeElement is used to build tree objects for
Repository.create_git_tree(). However, the GitHub API allows passing
sha=null to delete a file, which we don't allow. Extend the checking in
InputGitTreeElement to also allow None, and add a test for good measure.
Fixes#1318
With the Python 2.7 deadline fast approaching, modernize the codebase
making use of the modernize module to switch to using six, as well as
other upcoming features, such as absolute imports . Stop using 2to3
for Travis, yay!
This is a minor thing. It’s a convention, not a rule (obviously)—but it’s also a best practice.
Many text editors look for this kind of comment as the first line—or second line, if there is a shebang (the `#!/usr/bin/env python`, or whatever else)—and make use of this to determine the file’s encoding.
Steve Kowalik