Fix some userscript syntax issues

Thanks to (a hacked) pyupgrade

misc/userscripts/qute-bitwarden

@@ -196,7 +196,7 @@ def dmenu(items, invocation, encoding):
 def fake_key_raw(text):
     for character in text:
         # Escape all characters by default, space requires special handling
-        sequence = '" "' if character == ' ' else '\{}'.format(character)
+        sequence = '" "' if character == ' ' else r'\{}'.format(character)
         qute_command('fake-key {}'.format(sequence))
 
 

misc/userscripts/qute-pass

@@ -188,7 +188,7 @@ def dmenu(items, invocation):
 def fake_key_raw(text):
     for character in text:
         # Escape all characters by default, space requires special handling
-        sequence = '" "' if character == ' ' else '\{}'.format(character)
+        sequence = '" "' if character == ' ' else r'\{}'.format(character)
         qute_command('fake-key {}'.format(sequence))
 
 

misc/userscripts/readability

@@ -10,7 +10,6 @@
 # Usage:
 #   :spawn --userscript readability
 #
-from __future__ import absolute_import
 import codecs, os
 
 tmpfile = os.path.join(