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.