ANSI codeblocks break

[cibere]

ANSI codeblocks don't render properly.

Testing it

Send a message with

�[35mtest1                    �[37m:  �[34m136�[39m

inside a codeblock set to ansi

Expected Result (result without plugin):

Actual Result (result with plugin)

[j4k0xb]

works fine:

just saying, you can't use U+001B in github:

try copying from another site like https://codepoints.net/U+001B