Slightly widening and relaxing the header regex.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5158 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2015-03-25  Benno Schulenberg  <bensberg@justemail.net>
+	* doc/syntax/debian.nanorc: Slightly widen and relax the header regex.
+
 2015-03-23  Benno Schulenberg  <bensberg@justemail.net>
 	* src/text.c (do_alt_speller): Avoid the spell checker reporting
 	an error when the marked region is zero bytes long.  The message

doc/syntax/debian.nanorc

 ## Here is an example for apt's sources.list.
 
-syntax "apt/sources.list" "sources\.list(\.old|~)?$" "apt/sources\.list\.d/.*\.list$"
+syntax "apt/sources.list" "sources\.list(~|\.old|\.save)?$" "sources\.list\.d/.*\.list(~|\.old|\.save)?$"
 
 # Coloring the deb lines, working from tail to head.  First the
 # components -- well, everything, and thus also the components.