On Unity Wiki I see dynamic text that says "Invalid language". Why?

Below is what I see.

Invalid language.
You need to specify a language like this: …
Supported languages for syntax highlighting.
You need to specify a language like this: …
Supported languages for syntax highlighting

I am trying to ascertain the format of the code below this and assume that this “dynamic” text is saying the code is invalid. Please help me understand. I am trying to us the following code but this problem keeps me from using it.

http://wiki.unity3d.com/index.php?title=DepthMask

It’s irrelevant; don’t worry about it. It happened when the wiki was last updated but has no effect since it’s just about syntax highlighting (or not) on the wiki.