LIMIT is not highlighted as a keyword in query example

[DanielNoord]

For the following exercise:
https://pgexercises.com/questions/basic/unique.html

The solution includes (and introduces) the LIMIT keyword. However, in contrast to other keywords such as SELECT and DISTINCT LIMIT does not receive the blue/purple highlighting that other keywords do.
This seems to indicate a difference between these types of keywords that (as far as I know) doesn't exist.