chore: harden tilde fences and clean error sanitization formatting

Agent-Logs-Url: https://github.com/statch/gitbot/sessions/46b730a3-a822-49cd-9473-c994c6dd7db6

Co-authored-by: seven7ty <63970738+seven7ty@users.noreply.github.com>

Author: Copilot

cogs/backend/handle/errors/_error_tools.py

@@ -42,10 +42,12 @@ async def log_error_in_discord(ctx: GitBotContext, error: Exception, _actual=Non
         )
         message: str = ctx.bot.mgr.sanitize_codeblock_content(str(error))
         tb: str = ctx.bot.mgr.sanitize_codeblock_content(format_tb(error.__traceback__))
+        sanitized_args: str = ctx.bot.mgr.sanitize_codeblock_content(format_args(ctx.args))
+        sanitized_kwargs: str = ctx.bot.mgr.sanitize_codeblock_content(format_kwargs(ctx.kwargs))
         embed.add_field(name='Message', value=f'```{message}```')
         embed.add_field(name='Traceback', value=f'```{tb}```')
         embed.add_field(name='Arguments',
-                        value=f'```properties\nargs={ctx.bot.mgr.sanitize_codeblock_content(format_args(ctx.args))}\nkwargs={ctx.bot.mgr.sanitize_codeblock_content(format_kwargs(ctx.kwargs))}```')
+                        value=f'```properties\nargs={sanitized_args}\nkwargs={sanitized_kwargs}```')
     elif isinstance(error, commands.CommandNotFound):
         error_text: str = ctx.bot.mgr.sanitize_codeblock_content(str(error))
         embed: GitBotEmbed = GitBotEmbed(

lib/manager.py

@@ -243,6 +243,7 @@ def sanitize_codeblock_content(content: str | None, neutralize_mentions: bool =
         if not content:
             return ''
         content = content.replace('```', '`\u200b`\u200b`')
+        content = content.replace('~~~', '~\u200b~\u200b~')
         if neutralize_mentions:
             content = content.replace('@', '@\u200b')
         return content