[TxMt] Rendered source code comments

[David Whetstone]

Here's a suggestion I'm sure will never see the light of day, but one  
I would love to see -- rendered source code comments.

Basically, I would like to have the option of adding commentary to my  
code in whatever text-based format works best for the type of comment  
I'm making (latex, markdown, rdoc, dot, etc.), and have those comments  
rendered in-line, hiding the original text behind the rendered view.   
The editor could have a hotkey to toggle between rendered comments and  
regular text comments.  Some kind of 'meta'-markup could be used in  
the comment to indicate to the editor how a particular block should be  
rendered.

This is a lot like Knuth's literate programming concept, only less  
invasive to your coding process and without requiring you to compile  
your file to see the formatted commentary.

Imagine, you could have beautifully rendered diagrams, equations, and  
discourse right in your source file.

Comments?