* blacken-docs: Manual fixes for command to pass without errors
* blacken-docs: Adds blacken-docs step to precommit hook.
* blacken-docs: Adds changes made by command itself.
* blacken-docs: Modifies blacken-docs step to only process files under "docs" directory
* blacken-docs: Updates pre-commit config file to exclude all directories other than "docs" to be compatible with "--all-files" flag.
* blacken-docs: Adds commas at the end to make it look identical to pre-black version
* Remove trailing whitespace from lines
* Remove trailing nad leading whitespace from files
Allows for cleaner diffs in future changes. For editors that
automatically clean up whitespace on save, will avoid unrelated line
changes in diffs.
