Description:

KaTeX syntax (used intentionally or unintentionally) in code blocks is interpreted and results in weird strings.

Server Setup Information:

• Version of Rocket.Chat Server: 0.59.1
• Operating System: Ubuntu 16.04 - x86_64
• Deployment Method(snap/docker/tar/etc): docker
• Number of Running Instances: 3
• DB Replicaset Oplog: Enabled
• Node Version: v4.8.4

Steps to Reproduce:

1. Send code block including KaTeX syntax (single or multi line):
   grep -A 2 "\[${TO_PROFILE}\]" (add `)
   
2. Rendering is broken in single or multi line cases:
   

Expected behavior:

Don't (try) to interpret/render KaTeX in code blocks.

Actual behavior:

KaTeX is interpreted/rendered in code blocks (incorrectly).