[PATCH] make reformat source behave nicer

[Jens Dagerbo]

Hi,

Problem: Running Edit -> Reformat Source with Kate as editor currently has a 
few problems:

1. Syntax highlighting is dropped
2. Undo history is cleared

My patch attempts to fix these two in a way that works with at least both Kate 
and QEditor with minimal code changes.

One problem persists though, while it is now possible to undo the 
reformatting, doing so is a two step process. Both Kate and QEditor remembers 
that the buffer was emptied before it was written to. I can't seem to find 
any way around this using the KTextEditor interface, unfortunately.

regards,

Jens Dagerbo (aka teatime)
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