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-rw-r--r--gnu/usr.bin/man/apropos/apropos.man4
1 files changed, 4 insertions, 0 deletions
diff --git a/gnu/usr.bin/man/apropos/apropos.man b/gnu/usr.bin/man/apropos/apropos.man
index 5d0fff3d1481..b3cc71cfd8a1 100644
--- a/gnu/usr.bin/man/apropos/apropos.man
+++ b/gnu/usr.bin/man/apropos/apropos.man
@@ -32,6 +32,10 @@ of system commands for keywords and displays the result on the
standard output.
.Nm whatis
displays only complete word matches.
+.Pp
+.Ar keyword
+really is a regular expression, please read grep(1) manual page for
+more information about its format.
.Sh RETURN VALUES
The
.Nm