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-rw-r--r--Documentation/diff-options.txt5
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diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index d8696b7b36..77a3f78dd7 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -159,5 +159,10 @@
-w::
Shorthand for "--ignore-all-space".
+--exit-code::
+ Make the program exit with codes similar to diff(1).
+ That is, it exits with 1 if there were differences and
+ 0 means no differences.
+
For more detailed explanation on these common options, see also
link:diffcore.html[diffcore documentation].