Cleanup

qutebrowser/utils/config.py

@@ -130,6 +130,7 @@ class FontDict(dict):
         except KeyError:
             return None
 
+
 class Config(ConfigParser):
 
     """Our own ConfigParser subclass."""

qutebrowser/utils/misc.py

@@ -54,7 +54,9 @@ def read_file(filename):
 
 
 def trace_lines(do_trace):
-    def trace(frame, event, arg):
+    """Turn on/off printing each executed line."""
+    def trace(frame, event, _):
+        """Trace function passed to sys.settrace."""
         print("{}, {}:{}".format(event, frame.f_code.co_filename,
                                  frame.f_lineno))
         return trace

qutebrowser/widgets/mainwindow.py

@@ -28,6 +28,7 @@ from qutebrowser.widgets.browser import TabbedBrowser
 from qutebrowser.widgets.completion import CompletionView
 import qutebrowser.utils.config as config
 
+
 class MainWindow(QWidget):
 
     """The main window of QuteBrowser.