[Blocking] # symbol in chat text causes a Syntax Error

Verification builds: 1.6.0.0 - RC0, Beta 15 (980905)

Summary: A # symbol in the chat text causes a Syntax error.

Impact: The chat text is not output and any Command Blocks immediately after this command will not execute.  The case of Dr Splice's Lab Escape; this causes the flow of the game to break.

Repro Steps:

1. Add a # to a say command
2. Run it
3. Notice it fails

Observed Results: The command block outputs "Syntax Error" (unexpected "#").

Expected Results: The say command should work with #, as in previous builds.

Screenshots/Videos attached: https://i.imgur.com/RbsrZvZ.png