Log message:
py-flakes: updated to 2.2.0

2.2.0:
- Include column information in error messages
- Fix ``@overload`` detection with other decorators and in non-global scopes
- Fix return-type annotation being a class member
- Fix assignment to ``_`` in doctests with existing ``_`` name
- Namespace attributes which are attached to ast nodes with ``_pyflakes_`` to
  avoid conflicts with other libraries (notably bandit)
- Add check for f-strings without placeholders
- Add check for unused/extra/invalid ``'string literal'.format(...)``
- Add check for unused/extra/invalid ``'string literal % ...``
- Improve python shebang detection
- Allow type ignore to be followed by a code ``# type: ignore[attr-defined]``
- Add support for assignment expressions (PEP 572)
- Support ``@overload`` detection from ``typing_extensions`` as well
- Fix ``@overload`` detection for async functions
- Allow ``continue`` inside ``finally`` in python 3.8+
- Fix handling of annotations in positional-only arguments
- Make pyflakes more resistant to future syntax additions
- Fix false positives in partially quoted type annotations
- Warn about ``is`` comparison to tuples
- Fix ``Checker`` usage with async function subtrees
- Add check for ``if`` of non-empty tuple
- Switch from ``optparse`` to ``argparse``
- Fix false positives in partially quoted type annotations in unusual contexts
- Be more cautious when identifying ``Literal`` type expressions

Log message:
py-flakes: updated to 2.1.1

2.1.1:
- Fix reported line number for type comment errors
- Fix typing.overload check to only check imported names

Log message:
py-flakes: updated to 2.1.0

Release 2.1.0
- Allow intentional assignment to variables named _
- Recognize __module__ as a valid name in class scope
- pyflakes.checker.Checker supports checking of partial ast trees
- Detect assign-before-use for local variables which shadow builtin names
- Detect invalid print syntax using >> operator
- Treat async for the same as a for loop for introducing variables
- Add detection for list concatenation in __all__
- Exempt @typing.overload from duplicate function declaration
- Importing a submodule of an as-aliased import-import is marked as
  used
- Report undefined names from __all__ as possibly coming from a *
  import
- Add support for changes in Python 3.8-dev
- Add support for PEP 563 (from __future__ import annotations)
- Include Python version and platform information in pyflakes --version
- Recognize __annotations__ as a valid magic global in Python 3.6+
- Mark names used in PEP 484 # type: ... comments as used
- Add check for use of is operator with str, bytes, and int
  literals

Log message:
py-flakes: updated to 2.0.0

2.0.0 (2018-05-20)
- Drop support for EOL Python <2.7 and 3.2-3.3
- Check for unused exception binding in except: block
- Handle string literal type annotations
- Ignore redefinitions of _, unless originally defined by import
- Support __class__ without self in Python 3
- Issue an error for raise NotImplemented(...)

Log message:
devel/py-flakes: Add ALTERNATIVES

Log message:
1.6.0:
- Process function scope variable annotations for used names
- Find Python files without extensions by their shebang

Log message:
Update to 1.5.0

Upstream changes:
1.5.0 (2017-01-09)
  - Enable support for PEP 526 annotated assignments

1.4.0 (2016-12-30):
  - Change formatting of ImportStarMessage to be consistent with other errors
  - Support PEP 498 "f-strings"

Log message:
Use "${MV} || ${TRUE}" and "${RM} -f" consistently in \ 
post-install targets.

Log message:
Changes 1.3.0:
- Fix PyPy2 Windows IntegrationTests
- Check for duplicate dictionary keys
- Fix TestMain tests on Windows
- Fix "continue" and "break" checks ignoring py3.5's \ 
"async for" loop

Log message:
Remove unnecessary PLIST_SUBST and FILES_SUBST that are now provided
by the infrastructure.

Mark a couple more packages as not ready for python-3.x.