Added

• Travis CI now runs Pylint on modified lines via pytest-darker
• Darker can now be used as a pre-commit hook (see pre-commit)
• Document integration with Vim
• Thank all contributors right in the README
• RevisionRange class and Git repository test fixture improvements in preparation for a larger refactoring coming in #80

Fixed

• Improve example in README and clarify that path argument can also be a directory

• Configuration for Darker can now be done in pyproject.toml.
• The formatting of the Darker code base itself is now checked using Darker itself and pytest-darker. Currently the formatting is a mix of Black 19.10 and Black 20.8 rules, and Travis CI only requires Black 20.8 formatting for lines modified in merge requests. In a way, Darker is now eating its own dogfood.
• Support commit ranges for -r/--revision. Useful for comparing to the best common ancestor, e.g. master....
• Configure Flake8 verification for Darker's own source code

This version makes Darker usable for checking feature branches in a CI system.

Added

• -L/--lint option for running a linter for modified lines.
• --check returns 1 from the process but leaves files untouched if any file would require reformatting
• Untracked Python files – e.g. those added recently – are now also reformatted
• -r <rev> / --revision <rev> can be used to specify the Git revision to compare against when finding out modified lines. Defaults to HEAD as before.
• --no-skip-string-normalization flag to override skip_string_normalization = true from a configuration file
• The --diff option will highlight syntax on screen if the pygments package is available.

Fixed

• Paths from --diff are now relative to current working directory, similar to output from black --diff, and blank lines after the lines markers (@@ ... @@) have been removed.