bug#13949: 24.3.50; `fill-paragraph' should not always put the buffer as modified

[Dani Moncayo]

Recipe from "emacs -Q":

1. Visit some plain text file.
2. Move point to some paragraph with more that one line.
3. M-q C-x C-s
4. M-q

After step #3, the buffer is not modified wrt its file (you've just
save it), but step #4 puts the buffer in a modified state ("**" flag
in the modeline).

This seems a bug, since step #4 didn't make any change in the buffer
contents (the paragraph was already filled).


In GNU Emacs 24.3.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.13)
 of 2013-03-13 on LEG570
Bzr revision: 112040 kfogel@red-bean.com-20130313185405-ibq2um8vj55d4x0a
Windowing system distributor `The X.Org Foundation', version 11.0.11300000
System Description:     Ubuntu 12.10

-- 
Dani Moncayo