fix logging

bot.py

@@ -78,6 +78,7 @@ class BotClient(discord.Client):
                     calc = await self._calculate(args)
                     await message.reply(content=calc.strip())
                 except Exception as e:
+                    _log.exception("running calculation")
                     await message.reply(
                         content="```\n" + str(e) + "\n```", delete_after=30
                     )

calc.js

@@ -121,9 +121,7 @@ function* iterate(arr) {
 function unwrapToken(type, token) {
   assert(
     token.tokenType.name == type,
-    "expected token %s, got %s",
-    type,
-    token.tokenType.name
+    `expected token ${type}, got ${token.tokenType.name}`
   );
   return token.image;
 }