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-rw-r--r--doc/usage/cmd/setexpr.rst1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/usage/cmd/setexpr.rst b/doc/usage/cmd/setexpr.rst
index d245a13ca88..593a0ea91e1 100644
--- a/doc/usage/cmd/setexpr.rst
+++ b/doc/usage/cmd/setexpr.rst
@@ -39,6 +39,7 @@ setexpr name gsub <r> <s> [<t>]
string <t>, substitute the string <s>.
The result is assigned to <name>.
If <t> is not supplied, use the old value of <name>.
+ If no substring matching <r> is found in <t>, assign <t> to <name>.
setexpr name sub <r> <s> [<t>]
Just like gsub(), but replace only the first matching substring