black 21.5b1

on Python PyPI

Black

• Refactor src/black/__init__.py into many files (#2206)

Documentation

• Replaced all remaining references to the master branch with the main branch. Some additional changes in the source code were also made. (#2210)
• Sigificantly reorganized the documentation to make much more sense. Check them out by heading over to the stable docs on RTD. (#2174)