I suggest something like this.
#! /bin/sh /usr/share/dpatch/dpatch-run
## 15_extensions.dpatch by Clint Adams <[EMAIL PROTECTED]>
##
## All lines beginning with `## DP:' are a description of the patch.
## DP: add .png as a valid extension
@DPATCH@
diff -urNad --exclude=CVS --exclude=.svn ./xloadimagerc
/tmp/dpep-work.ZU7i4e/xloadimage-4.1/xloadimagerc
--- ./xloadimagerc 1993-10-21 17:30:32.000000000 -0400
+++ /tmp/dpep-work.ZU7i4e/xloadimage-4.1/xloadimagerc 2005-09-26
14:22:16.000000000 -0400
@@ -14,6 +14,7 @@
.pbm .pgm .ppm # PBMPLUS
.img # GEM IMG
.pcx # PCX image
+ .png # PNG image
# add uufilter for automatic uudecoding of files ending in .uu or .uue
filter = "uufilter -s" .uu .uue
--
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