The documentation for the `FileProcessor` class used `indect_char` while the
class itself uses the more sensible name `indent_char`. This updates both the
docstring as well as the documentation.
Yesterday we released the flake8-polyfill package to help with Flake8
compatibility issues. This adds documentation to Flake8 to help people
use that and to guide them towards it.
When calling `add_option` it returns an `Option` object which can return the
primary name of the option via `get_opt_name`. This should be used primarily
in the cross compatible implementation so that the order of parameters does
not matter.
