Pycodestyle

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Changes:

* Fix physical checks (such as W191) at end of file. PR 961.
* Add ``--indent-size`` option (defaulting to ``4``). PR 970.
* W605: fix escaped crlf false positive on windows. PR 976.

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Announcements:

* Anthony Sottile (asottile) joined the team as a core developer. :tada:

Changes:

* E306: fix detection inside ``async def``. PR 929.
* E301: fix regression disallowing decorated one-liners. PR 927.
* E714: fix false positive with chained ``is not``. PR 931.

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New checks:

* E225: require whitespace around ``and`` ``in`` ``is`` and ``or``. PR 847.

Changes:

* E117: fix indentation using tabs by treating as 8-space indents. PR 837.
* E721: fix false positive with names containg ``istype``. PR 850.
* E741: allow ``l`` as a named argument in a function call. PR 853.
* E302: fix false-negative with decorated functions. PR 859.
* W504: ellipsis (``...``) is no longer treated as a binary operator. PR 875.
* E402: allow ``with``, ``if``, ``elif``, ``else`` to guard imports. PR 834.
* Add support for assignment expressions ``:=`` (PEP 572). PR 879.
* Add support for positional-only arguments ``/`` (PEP 570). PR 872, 918.
* Add support for python 3.8.
* Add support for matrix multiplication operator ` (PEP 465). PR 897.
* Support visual indent for continuation lines for ``with`` / ``assert`` /
``raise``. PR 912.
* E302: allow two blank lines after a block of one-liners. PR 913.
* E302: allow two-and-fewer newlines at the top of the file. PR 919.

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New checks:

* E117: Over-indented code blocks
* W505: Maximum doc-string length only when configured with --max-doc-length

Changes:

* Remove support for EOL Python 2.6 and 3.3. PR 720.
* Add E117 error for over-indented code blocks.
* Allow W605 to be silenced by ` noqa` and fix the position reported by W605
* Allow users to omit blank lines around one-liner definitions of classes and
functions
* Include the function return annotation (``->``) as requiring surrounding
whitespace only on Python 3
* Verify that only names can follow ``await``. Previously we allowed numbers
and strings.
* Add support for Python 3.7
* Fix detection of annotated argument defaults for E252
* Correct the position reported by W504

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New checks:

* Add W504 warning for checking that a break doesn't happen after a binary
operator. This check is ignored by default. PR 502.
* Add W605 warning for invalid escape sequences in string literals. PR 676.
* Add W606 warning for 'async' and 'await' reserved keywords being introduced
in Python 3.7. PR 684.
* Add E252 error for missing whitespace around equal sign in type annotated
function arguments with defaults values. PR 717.

Changes:

* An internal bisect search has replaced a linear search in order to improve
efficiency. PR 648.
* pycodestyle now uses PyPI trove classifiers in order to document supported
python versions on PyPI. PR 654.
* 'setup.cfg' '[wheel]' section has been renamed to '[bdist_wheel]', as
the former is legacy. PR 653.
* pycodestyle now handles very long lines much more efficiently for python
3.2+. Fixes 643. PR 644.
* You can now write 'pycodestyle.StyleGuide(verbose=True)' instead of
'pycodestyle.StyleGuide(verbose=True, paths=['-v'])' in order to achieve
verbosity. PR 663.
* The distribution of pycodestyle now includes the license text in order to
comply with open source licenses which require this. PR 694.
* 'maximum_line_length' now ignores shebang ('!') lines. PR 736.
* Add configuration option for the allowed number of blank lines. It is
implemented as a top level dictionary which can be easily overwritten. Fixes
732. PR 733.

Bugs:

* Prevent a 'DeprecationWarning', and a 'SyntaxError' in future python, caused
by an invalid escape sequence. PR 625.
* Correctly report E501 when the first line of a docstring is too long.
Resolves 622. PR 630.
* Support variable annotation when variable start by a keyword, such as class
variable type annotations in python 3.6. PR 640.
* pycodestyle internals have been changed in order to allow 'python3 -m
cProfile' to report correct metrics. PR 647.
* Fix a spelling mistake in the description of E722. PR 697.
* 'pycodestyle --diff' now does not break if your 'gitconfig' enables
'mnemonicprefix'. PR 706.

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Bugs:

* Fix regression in detection of E302 and E306; 618, 620