bot: round rate limit time_left value up, eliminate microseconds

This makes rate limit feedback from the bot more readable.

We could go full-on custom format, but honestly the built-in string
representation of a timedelta is perfectly serviceable if you get rid of
the microseconds portion. (How you get there is pretty ugly, but it's
not AS bad as a whole new helper function in `tools.time`.)

sopel/bot.py

@@ -8,9 +8,11 @@
 from __future__ import annotations
 
 from ast import literal_eval
+from datetime import timedelta
 import inspect
 import itertools
 import logging
+import math
 import re
 import threading
 import time
@@ -631,7 +633,11 @@ def rate_limit_info(
             return False, None
 
         next_time = metrics.last_time + rate_limit
-        time_left = next_time - at_time
+        time_left = timedelta(
+            seconds=math.ceil(
+                (next_time - at_time).total_seconds()
+            )
+        )
 
         message: Optional[str] = None
 

test/test_bot.py

@@ -1174,8 +1174,8 @@ def testrule(bot, trigger):
     # assert there is now a NOTICE which contains templated time left information
     assert mockbot.backend.message_sent
     patt = (br"NOTICE Test :"
-            br"time_left=\d+:\d+:\d+(\.\d+)? "
-            br"time_left_sec=\d+(\.\d+)?")
+            br"time_left=\d+:\d+:\d+ "
+            br"time_left_sec=\d+")
     assert re.match(patt, mockbot.backend.message_sent[0])