Some broad sweeping changes.
- Added a section "What is checked".
- Define acceptable of type hints more carefully.
- Define type aliases.
- Rename Callbacks section to Callable.
- Rewrite forward references section.
- Spec PY3 and POSIX.
- Removed several sections that didn't specify anything:
  - The place of the typing module
  - Usage patterns
  - Is type hinting Pythonic?
1 file changed