Fixed E401 flake8 errors

multiple imports on one line

_pytest/_code/source.py

@@ -2,7 +2,8 @@ from __future__ import absolute_import, division, generators, print_function
 
 from bisect import bisect_right
 import sys
-import inspect, tokenize
+import inspect
+import tokenize
 import py
 cpy_compile = compile
 

_pytest/helpconfig.py

@@ -4,7 +4,8 @@ from __future__ import absolute_import, division, print_function
 import py
 import pytest
 from _pytest.config import PrintHelp
-import os, sys
+import os
+import sys
 from argparse import Action
 
 

testing/test_argcomplete.py

@@ -1,5 +1,6 @@
 from __future__ import absolute_import, division, print_function
-import py, pytest
+import py
+import pytest
 
 # test for _argcomplete but not specific for any application
 

testing/test_collection.py

@@ -1,5 +1,6 @@
 from __future__ import absolute_import, division, print_function
-import pytest, py
+import pytest
+import py
 
 from _pytest.main import Session, EXIT_NOTESTSCOLLECTED
 

testing/test_config.py

@@ -1,5 +1,6 @@
 from __future__ import absolute_import, division, print_function
-import py, pytest
+import py
+import pytest
 
 import _pytest._code
 from _pytest.config import getcfg, get_common_ancestor, determine_setup

testing/test_parseopt.py

@@ -1,7 +1,8 @@
 from __future__ import absolute_import, division, print_function
 import sys
 import os
-import py, pytest
+import py
+import pytest
 from _pytest import config as parseopt
 
 

tox.ini

@@ -196,6 +196,6 @@ filterwarnings =
     ignore:.*inspect.getargspec.*deprecated, use inspect.signature.*:DeprecationWarning
 
 [flake8]
-ignore = E401,E402,E501,E701,E702,E704,E712,E731
+ignore = E402,E501,E701,E702,E704,E712,E731
 max-line-length = 120
 exclude = _pytest/vendored_packages/pluggy.py