Fix lint

qutebrowser/browser/qutescheme.py

@@ -97,6 +97,7 @@ class add_handler:  # pylint: disable=invalid-name
             return self._function(*args, **kwargs)
 
     def wrong_backend_handler(self, url):
+        """Show an error page about using the invalid backend."""
         html = jinja.render('error.html',
                             title="Error while opening qute:url",
                             url=url.toDisplayString(),

qutebrowser/browser/webengine/webenginequtescheme.py

@@ -29,12 +29,14 @@ from qutebrowser.utils import log
 
 class QuteSchemeHandler(QWebEngineUrlSchemeHandler):
 
+    """Handle qute:* requests on QtWebEngine."""
+
     def install(self, profile):
         """Install the handler for qute: URLs on the given profile."""
         profile.installUrlSchemeHandler(b'qute', self)
 
     def requestStarted(self, job):
-        """This method is called when a request for the scheme is started.
+        """Handle a request for a qute: scheme.
 
         This method must be reimplemented by all custom URL scheme handlers. The
         request is asynchronous and does not need to be handled right away.

qutebrowser/browser/webkit/network/webkitqutescheme.py

@@ -54,7 +54,7 @@ class QuteSchemeHandler(schemehandler.SchemeHandler):
             return networkreply.ErrorNetworkReply(
                 request, errorstr, QNetworkReply.ContentNotFoundError,
                 self.parent())
-        except qutescheme.QuteSchemeOSError:
+        except qutescheme.QuteSchemeOSError as e:
             return networkreply.ErrorNetworkReply(
                 request, str(e), QNetworkReply.ContentNotFoundError,
                 self.parent())