If I only change the syntax highlighting in a post, is that proper editing?

So, I was editing a question due to it's syntax highlighting, and as most of you know, you can direct StackOverflow to change the syntax highlighting of a code block with the HTML comment:

<!-- language: (the language here) -->

But I noticed two things about this:

1. Adding comments aren't shown in edit review pages, as you can see from my recent edit here You can see HTML comments by clicking the "Markdown" option in the review edits screen.
2. This doesn't benefit the question too much in my eyes. Just changes the way it appears.

So, my question is, would only changing the syntax highlighting of code-blocks in a question be considered a proper edit / a good edit?