[cmake-developers] Source code ///! comments

[Sebastian Holtermann]

>> Looking through the source code I found various comments
>> starting with "///!"
>> If Doxygen is targeted, the comment should start with either "///" or
>> "//!".
> 
> It's likely a typo.  For reference, I personally prefer `/** */`.
> 

Okay, then why not do a cleanup that replaces "///!" with "//!"?
I'll prepare a patch for that.