For consistency, add shell prompt to recently added text.
INSERTED DELETED
1 1 readme.txt
1 1 TOTAL over 1 changed file
Index: readme.txt
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--- readme.txt
+++ readme.txt
@@ -19,6 +19,6 @@
I tested this script in recent versions of gawk and mawk.
Older versions of mawk cannot handle character class names.
To run with older versions of mawk, edit like so: