I was sitting and writing some CSS and HTML the other day and when I executed the code I was missing some text, so I went through the code to figure out what I had done wrong - this took me quite a while to find the source of the problem (an rather embarrassing one

Anyway, this little incident made me come up with this little suggestion:

Had I had this little highlighting in my code I would have saved myself a bit of time and learned a little in the process (I actually think I did !)
I got a little inspired by looking at some of the screenshots of the debugging for PHP and I think my suggestion should work in a similar way.
What do the devs and the rest of you think about this ?