More docs for recovery_token_challenge, cleanup

letsencrypt/client/recovery_token_challenge.py

@@ -1,9 +1,15 @@
+"""Recovery Token Identifier Validation Challenge."""
 import dialog
 
 from letsencrypt.client import challenge
 
 
 class RecoveryToken(challenge.Challenge):
+    """Recovery Token Identifier Validation Challenge.
+
+    Based on draft-barnes-acme, section 6.4.
+
+    """
 
     def __init__(self, configurator):
         super(RecoveryToken, self).__init__(configurator)
@@ -12,13 +18,13 @@ class RecoveryToken(challenge.Challenge):
     def perform(self, quiet=True):
         cancel, self.token = dialog.generic_input(
             "Please Input Recovery Token: ")
-        if cancel == 1:
-            return False
-
-        return True
+        return cancel != 1
 
     def cleanup(self):
         pass
 
     def generate_response(self):
-        return {"type": "recoveryToken", "token": self.token}
+        return {
+            "type": "recoveryToken",
+            "token": self.token,
+        }