lint: fix E741 ambiguous variable names and F841 unused variable

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

matrixbot/commands.py

@@ -1266,7 +1266,7 @@ async def cmd_hangman(client: AsyncClient, room_id: str, sender: str, args: str)
         display = _hangman_display(game)
         wrong = game["wrong_count"]
         guessed = sorted(game["guessed_letters"])
-        wrong_letters = [l for l in guessed if l not in game["word"]]
+        wrong_letters = [ch for ch in guessed if ch not in game["word"]]
         plain = (
             f"Hangman already in progress!\n"
             f"{_HANGMAN_STAGES[wrong]}\n"
@@ -1370,7 +1370,7 @@ async def cmd_guess(client: AsyncClient, room_id: str, sender: str, args: str):
             await send_html(client, room_id, plain, html)
             return
 
-        wrong_letters = sorted(l for l in game["guessed_letters"] if l not in word)
+        wrong_letters = sorted(ch for ch in game["guessed_letters"] if ch not in word)
         plain = (
             f"✅ '{letter.upper()}' is in the word!\n"
             f"{_HANGMAN_STAGES[game['wrong_count']]}\n"
@@ -1389,7 +1389,7 @@ async def cmd_guess(client: AsyncClient, room_id: str, sender: str, args: str):
         game["wrong_count"] += 1
         wrong_count = game["wrong_count"]
         display = _hangman_display(game)
-        wrong_letters = sorted(l for l in game["guessed_letters"] if l not in word)
+        wrong_letters = sorted(ch for ch in game["guessed_letters"] if ch not in word)
 
         if wrong_count >= 6:
             del _HANGMAN_GAMES[room_id]
@@ -1598,7 +1598,6 @@ async def cmd_wyr(client: AsyncClient, room_id: str, sender: str, args: str):
     if hasattr(resp, "event_id"):
         await send_reaction(client, room_id, resp.event_id, "🅰️")
         await send_reaction(client, room_id, resp.event_id, "🅱️")
-        event_id = resp.event_id
 
         async def reveal():
             await asyncio.sleep(30)
@@ -1976,7 +1975,7 @@ async def cmd_debate(client: AsyncClient, room_id: str, sender: str, args: str):
             against_text = against_part.strip()
         else:
             # Fallback: try to split in half
-            lines = [l.strip() for l in text.split("\n") if l.strip()]
+            lines = [ln.strip() for ln in text.split("\n") if ln.strip()]
             mid = len(lines) // 2
             for_text = " ".join(lines[:mid]) if lines else "No argument generated."
             against_text = " ".join(lines[mid:]) if lines else "No argument generated."