Fix lint

qutebrowser/browser/network/qutescheme.py

@@ -213,7 +213,8 @@ def qute_help(win_id, request):
     if urlpath.endswith('.png'):
         return utils.read_file(path, binary=True)
     else:
-        return utils.read_file(path).encode('UTF-8', errors='xmlcharrefreplace')
+        data = utils.read_file(path)
+        return data.encode('UTF-8', errors='xmlcharrefreplace')
 
 
 @add_handler('settings')

scripts/asciidoc2html.py

@@ -87,7 +87,6 @@ class AsciiDoc:
             files.append((src, dst))
 
         # patch image links to use local copy
-        modified_files = []
         replacements = [
             ("http://qutebrowser.org/img/cheatsheet-big.png",
                 "qute://help/img/cheatsheet-big.png"),