At the risk of doing everything completely incorrectly, I have replaced the bug report template with something more concise and helpful. I also did a quick search through these issues for "fstab" before making this bug report. Correction, I looked through open issues for fstab. I just checked the closed ones, and it looks like this was actually noticed in the initial addition of the syntax definition, but may have just flew under the radar by accident. #706 (comment)

In the syntax definition for fstab, it should also accept a 2 as a valid option for the 6th field. I only noticed because I was trying to use the syntax file in Sublime Text and saw the big red block indicating a syntax error. In the output of bat /etc/fstab, that 2 is just white, which looked correct. Here's a permalink to the line in question.

EDIT: I also meant to link to that original mention.