py-flake8: Backport patches from upstream for py-codestyle-2.4.0 update

Since py-codestyle-2.4.0 update, py-flake8 no longer works. Backport all
relevant commits from upstream to address that.

PKGREVISION++

TODOleot: adjust py-codestyle DEPENDS pattern!

Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/devel/py-flake8/Makefile,v
retrieving revision 1.13
diff -u -p -r1.13 Makefile
--- Makefile	23 Mar 2018 21:09:11 -0000	1.13
+++ Makefile	13 May 2018 20:12:35 -0000
@@ -2,6 +2,7 @@
 
 DISTNAME=	flake8-3.5.0
 PKGNAME=	${PYPKGPREFIX}-${DISTNAME}
+PKGREVISION=	1
 CATEGORIES=	devel python
 MASTER_SITES=	${MASTER_SITE_PYPI:=f/flake8/}
 
Index: distinfo
===================================================================
RCS file: /cvsroot/pkgsrc/devel/py-flake8/distinfo,v
retrieving revision 1.11
diff -u -p -r1.11 distinfo
--- distinfo	8 Nov 2017 08:39:04 -0000	1.11
+++ distinfo	13 May 2018 20:12:35 -0000
@@ -4,3 +4,6 @@ SHA1 (flake8-3.5.0.tar.gz) = 302f3943291
 RMD160 (flake8-3.5.0.tar.gz) = 4533c09c33394ca31ab081ed09f370dfac415882
 SHA512 (flake8-3.5.0.tar.gz) = ac5d1bd9c44ed76c9e5cbd941b24bb552aa76e156b24ccda6cc8440ee90f3a574fdb393665adc75298e4f57111d7ab3115ef21ef9088fb327d0a9703d442450c
 Size (flake8-3.5.0.tar.gz) = 140608 bytes
+SHA1 (patch-setup.cfg) = 227164e8c9e0287227fadc13f522b84d6781acca
+SHA1 (patch-setup.py) = 2027b7f24cc5f99e5f77a45c97338d0cc6d69404
+SHA1 (patch-tox.ini) = ff417d4d05a5846db467015f19fba095e368ef70
Index: patches/patch-setup.cfg
===================================================================
RCS file: patches/patch-setup.cfg
diff -N patches/patch-setup.cfg
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ patches/patch-setup.cfg	13 May 2018 20:12:35 -0000
@@ -0,0 +1,17 @@
+$NetBSD$
+
+Add support for pycodestyle-2.4.0.
+
+From upstream commits 0273ca56, 85c503de, 68782675, e61d9d24, ef1d5cee.
+
+--- setup.cfg.orig	2017-10-23 11:16:02.000000000 +0000
++++ setup.cfg
+@@ -9,7 +9,7 @@ requires-dist = 
+ 	enum34; python_version<"3.4"
+ 	configparser; python_version<"3.2"
+ 	pyflakes >= 1.5.0, < 1.7.0
+-	pycodestyle >= 2.0.0, < 2.4.0
++	pycodestyle >= 2.4.0, < 2.5.0
+ 	mccabe >= 0.6.0, < 0.7.0
+ 
+ [egg_info]
Index: patches/patch-setup.py
===================================================================
RCS file: patches/patch-setup.py
diff -N patches/patch-setup.py
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ patches/patch-setup.py	13 May 2018 20:12:35 -0000
@@ -0,0 +1,36 @@
+$NetBSD$
+
+Add support for pycodestyle-2.4.0.
+
+From upstream commits 0273ca56, 85c503de, 68782675, e61d9d24, ef1d5cee.
+
+--- setup.py.orig	2017-08-08 00:31:43.000000000 +0000
++++ setup.py
+@@ -22,7 +22,7 @@ requires = [
+     # And in which releases we will update those ranges here:
+     # http://flake8.pycqa.org/en/latest/internal/releases.html#releasing-flake8
+     "pyflakes >= 1.5.0, < 1.7.0",
+-    "pycodestyle >= 2.0.0, < 2.4.0",
++    "pycodestyle >= 2.4.0, < 2.5.0",
+     "mccabe >= 0.6.0, < 0.7.0",
+     "setuptools >= 30",
+ ]
+@@ -108,7 +108,8 @@ setuptools.setup(
+             PEP8_PLUGIN('module_imports_on_top_of_file'),
+             PEP8_PLUGIN('compound_statements'),
+             PEP8_PLUGIN('explicit_line_join'),
+-            PEP8_PLUGIN('break_around_binary_operator'),
++            PEP8_PLUGIN('break_after_binary_operator'),
++            PEP8_PLUGIN('break_before_binary_operator'),
+             PEP8_PLUGIN('comparison_to_singleton'),
+             PEP8_PLUGIN('comparison_negative'),
+             PEP8_PLUGIN('comparison_type'),
+@@ -118,6 +119,8 @@ setuptools.setup(
+             PEP8_PLUGIN('python_3000_raise_comma'),
+             PEP8_PLUGIN('python_3000_not_equal'),
+             PEP8_PLUGIN('python_3000_backticks'),
++            PEP8_PLUGIN('python_3000_invalid_escape_sequence'),
++            PEP8_PLUGIN('python_3000_async_await_keywords'),
+         ],
+         'flake8.report': [
+             'default = flake8.formatting.default:Default',
Index: patches/patch-tox.ini
===================================================================
RCS file: patches/patch-tox.ini
diff -N patches/patch-tox.ini
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ patches/patch-tox.ini	13 May 2018 20:12:35 -0000
@@ -0,0 +1,17 @@
+$NetBSD$
+
+Add support for pycodestyle-2.4.0.
+
+From upstream commits 0273ca56, 85c503de, 68782675, e61d9d24, ef1d5cee.
+
+--- tox.ini.orig	2017-05-28 13:15:48.000000000 +0000
++++ tox.ini
+@@ -141,7 +141,7 @@ commands =
+ # defaults to selecting all other errors so we do not need select=E,F,W,I,D
+ # Once Flake8 3.0 is released and in a good state, we can use both and it will
+ # work well \o/
+-ignore = D203
++ignore = D203, W504
+ exclude =
+     .tox,
+     .git,