More variable renaming and simplification

https://github.com/sopel-irc/sopel/pull/1518/files#r268612840

sopel/bot.py

@@ -305,20 +305,18 @@ def say(self, text, recipient, max_messages=1):
 
             recipient_id = Identifier(recipient)
 
-            reciprec = self.stack.get(recipient_id)
-            if not reciprec:
-                reciprec = self.stack[recipient_id] = {
-                    'messages': [],
-                    'burst': self.config.core.flood_burst_lines,
-                }
-
-            if not reciprec['burst']:
+            recipient = self.stack.setdefault(recipient_id, {
+                'messages': [],
+                'flood_left': self.config.core.flood_burst_lines,
+            })
+
+            if not reciprec['flood_left']:
                 elapsed = time.time() - reciprec['messages'][-1][0]
-                reciprec['burst'] = min(
+                reciprec['flood_left'] = min(
                     self.config.core.flood_burst_lines,
                     int(elapsed) * self.config.core.flood_refill_rate)
 
-            if not reciprec['burst']:
+            if not reciprec['flood_left']:
                 elapsed = time.time() - reciprec['messages'][-1][0]
                 penalty = float(max(0, len(text) - 50)) / 70
                 wait = self.config.core.flood_empty_wait + penalty
@@ -337,7 +335,7 @@ def say(self, text, recipient, max_messages=1):
                         return
 
             self.write(('PRIVMSG', recipient), text)
-            reciprec['burst'] = max(0, reciprec['burst'] - 1)
+            reciprec['flood_left'] = max(0, reciprec['flood_left'] - 1)
             reciprec['messages'].append((time.time(), self.safe(text)))
             reciprec['messages'] = reciprec['messages'][-10:]
         finally: