[clue] An odd use of FUSE.

[David L. Anselmi]

So you've seen programs that convert some sort of plain text into something fancy.

LaTeX turns it into typeset postscript.

indent applies a standard formatting to C source.

Wikis, et. al., use an ASCII markup that is turned into HTML styles.

You've seen such programs run with an input and output file specified, as pipes, and automagically 
on the results of an editing session.

And now here's an example using FUSE.  Your files are mirrored at another location in the file 
system.  On one side of the mirror they are formatted as you like, on the other they are formatted 
according to the rules of the conversion program.  (No, you can't plug in your own converter, but 
you can make your own model for whatever that can do.)

http://ddumont.wordpress.com/2012/02/10/dpkg-edit-debiancontrol-description-without-worrying-about-leading-and/

Dave