pep8: Ignore line break before binary operator

PEP8 has switched its guidance [1] for where a line break should occur
in relation to a binary operator, so don't raise this warning for
new code and update the code base to follow the new style.

[1] https://www.python.org/dev/peps/pep-0008/#should-a-line-break-before-or-after-a-binary-operator

wa/utils/diff.py

@@ -95,8 +95,8 @@ def diff_sysfs_dirs(before, after, result):  # pylint: disable=R0914
                         logger.debug('Token length mismatch in {} on line {}'.format(bfile, i))
                         dfh.write('xxx ' + bline)
                         continue
-                    if ((len([c for c in bchunks if c.strip()]) == len([c for c in achunks if c.strip()]) == 2) and
-                            (bchunks[0] == achunks[0])):
+                    if ((len([c for c in bchunks if c.strip()]) == len([c for c in achunks if c.strip()]) == 2)
+                            and (bchunks[0] == achunks[0])):
                         # if there are only two columns and the first column is the
                         # same, assume it's a "header" column and do not diff it.
                         dchunks = [bchunks[0]] + [diff_tokens(b, a) for b, a in zip(bchunks[1:], achunks[1:])]

wa/utils/log.py

@@ -79,7 +79,7 @@ def init(verbosity=logging.INFO, color=True, indent_with=4,
     root_logger.addHandler(_console_handler)
 
     buffer_capacity = int(os.getenv('WA_LOG_BUFFER_CAPACITY',
-                                str(DEFAULT_INIT_BUFFER_CAPACITY)))
+                                    str(DEFAULT_INIT_BUFFER_CAPACITY)))
     _init_handler = InitHandler(buffer_capacity)
     _init_handler.setLevel(logging.DEBUG)
     root_logger.addHandler(_init_handler)

wa/utils/misc.py

@@ -404,8 +404,8 @@ def istextfile(fileobj, blocksize=512):
         If more than 30% of the chars in the block are non-text, or there
         are NUL ('\x00') bytes in the block, assume this is a binary file.
     """
-    _text_characters = (b''.join(chr(i) for i in range(32, 127)) +
-                        b'\n\r\t\f\b')
+    _text_characters = (b''.join(chr(i) for i in range(32, 127))
+                        + b'\n\r\t\f\b')
 
     block = fileobj.read(blocksize)
     if b'\x00' in block:

wa/utils/revent.py

@@ -155,8 +155,8 @@ class ReventRecording(object):
             else:  # not streaming
                 if not self._events:
                     self._duration = 0
-                self._duration = (self._events[-1].time -
-                                  self._events[0].time).total_seconds()
+                self._duration = (self._events[-1].time
+                                  - self._events[0].time).total_seconds()
         return self._duration
 
     @property

wa/utils/serializer.py

@@ -343,7 +343,7 @@ def _read_pod(fh, fmt=None):
         fmt = os.path.splitext(fh.name)[1].lower().strip('.')
         if fmt == '':
             # Special case of no given file extension
-            message = ("Could not determine format " +
+            message = ("Could not determine format "
                        "from file extension for \"{}\". "
                        "Please specify it or modify the fmt parameter.")
             raise ValueError(message.format(getattr(fh, 'name', '<none>')))