Description:

Emote detection fails around linebreaks.

Steps to reproduce:

1. Open a chat, for example a direct message to yourself.

2. Send the following single, multi-line message, which contains no trailing or leading whitespace:

   :D foo :D bar :D baz :D quux :D
   :D this :D is :D a simple :D test :D
   without :D leading :D or :D trailing :D emote
   :D hello :D world :D
   

Expected behavior:

The message is sent and all occurrences of :D get replaced by 😃.

Actual behavior:

The message is sent and MOST occurrences of :D get replaced by 😃, EXCEPT those around the linebreaks.

Server Setup Information:

• Version of Rocket.Chat Server: 0.70.0
• Operating System: dunno, shouldn't be relevant
• Deployment Method: dunno
• Number of Running Instances: 1, I guess, shouldn't be relevant
• DB Replicaset Oplog: dunno, shouldn't be relevant
• NodeJS Version: dunno
• MongoDB Version: dunno

Additional context

I found this issue while using a private instance. I'm just the end user, and have been told to direct any bug reports upstream.

Relevant logs:

JS console log: Loading: false (nothing else; seems irrelevant)

Server log: unavailable; this is a private instance. Shouldn't be relevant.