doc: add a cross reference from cat's man page to "tac"

* man/cat.x: See also "tac".

diff --git a/man/cat.x b/man/cat.x
index c2196786a81437c7e4c5351e32ae0242e80356d9..089020016f5b0f060807572ce45ee1db405a5296 100644 (file)
--- a/man/cat.x
+++ b/man/cat.x
@@ -2,3 +2,5 @@
 cat \- concatenate files and print on the standard output
 [DESCRIPTION]
 .\" Add any additional description here
+[SEE ALSO]
+\fBtac\fP(1).