fix pycodestyle and docs

Author: SomberNight

docs/protocol-methods.rst

@@ -1254,7 +1254,7 @@ Name methods (Namecoin and compatible coins)
 
 
 blockchain.name.get_value_proof
-=============================
+===============================
 
 Returns a name resolution proof, suitable for low-latency (single round-trip) resolution.
 

electrumx/server/session.py

@@ -1855,7 +1855,9 @@ async def name_get_value_proof(self, scripthash, cp_height=0):
             txid = update['tx_hash']
             height = update['height']
 
-            if self.coin.NAME_EXPIRATION is not None and prev_height is not None and height < prev_height - self.coin.NAME_EXPIRATION:
+            if (self.coin.NAME_EXPIRATION is not None
+                    and prev_height is not None
+                    and height < prev_height - self.coin.NAME_EXPIRATION):
                 break
 
             tx = await(self.transaction_get(txid))