Feature summary (what you would like to be able to do and where):
I would like to see syntax highlighting on View Source/protected pages.
Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
I wanted to try to analyze the template code of Template:Community Wishlist Survey/Proposal header but it was really hard to do because the page is protected and the View Source code does not have syntax highlighting:
So I was forced to copy and paste the code into an editor that did have syntax highlighting:
Benefits (why should this be implemented?):
Users looking at protected templates will be able to better-understand them.