Add more friendly error when corrected message is too long (#886)

* Add more friendly error when corrected message is too long

* Add maximum line count

* Remove unit tests

* Update correct.py

Author: dkay0670

techsupport_bot/commands/correct.py

@@ -55,9 +55,25 @@ async def correct_command(
         updated_message = self.prepare_message(
             message_to_correct.content, to_replace, replacement
         )
+
+        updated_message += " :white_check_mark:"
+
+        if len(updated_message) > 4096:
+            await auxiliary.send_deny_embed(
+                message="The corrected message is too long to send", channel=ctx.channel
+            )
+            return
+
+        if updated_message.count("\n") > 15:
+            await auxiliary.send_deny_embed(
+                message="The corrected message has too many lines to send",
+                channel=ctx.channel,
+            )
+            return
+
         embed = auxiliary.generate_basic_embed(
             title="Correction!",
-            description=f"{updated_message} :white_check_mark:",
+            description=updated_message,
             color=discord.Color.green(),
         )
         await ctx.send(