Fix warnings from tox

qutebrowser/browser/network/qutescheme.py

@@ -153,7 +153,7 @@ def qute_help(win_id, request):
     """Handler for qute:help. Return HTML content as bytes."""
     try:
         utils.read_file('html/doc/index.html')
-    except (FileNotFoundError, NotADirectoryError, OSError, BlockingIOError):
+    except FileNotFoundError:
         html = jinja.env.get_template('error.html').render(
             title="Error while loading documentation",
             url=request.url().toDisplayString(),

qutebrowser/mainwindow/tabbedbrowser.py

@@ -23,7 +23,7 @@ import functools
 import collections
 
 from PyQt5.QtWidgets import QSizePolicy
-from PyQt5.QtCore import pyqtSignal, pyqtSlot, QSize, QTimer, QUrl
+from PyQt5.QtCore import pyqtSignal, pyqtSlot, QTimer, QUrl
 from PyQt5.QtGui import QIcon
 
 from qutebrowser.config import config

qutebrowser/mainwindow/tabwidget.py

@@ -24,7 +24,8 @@ Module attributes:
                       between items.
 """
 
-import functools, math
+import functools
+import math
 
 from PyQt5.QtCore import pyqtSignal, pyqtSlot, Qt, QSize, QRect, QPoint, QTimer
 from PyQt5.QtWidgets import (QTabWidget, QTabBar, QSizePolicy, QCommonStyle,
@@ -296,7 +297,8 @@ class TabBar(QTabBar):
         """Set the tab bar font."""
         self.setFont(config.get('fonts', 'tabbar'))
 
-    def resizeEvent(self, s):
+    def resizeEvent(self, _s):
+        """Set the favicon size to the tabbar size minus some padding."""
         height = self.size().height()
         if height > 0:
             height = math.ceil(height - height / 7)