[patch] typo in awk.1

[Joachim Henke <free.software%gmx.com@localhost>]

Hi,

there is a small typo in awk.1 which confused me at the first look.
Please have a look at the attached patch. That way it's more in line
with the gawk documentation.

Best regards,
Jo.

Index: external/historical/nawk/bin/awk.1
===================================================================
RCS file: /cvsroot/src/external/historical/nawk/bin/awk.1,v
retrieving revision 1.3
diff -u -r1.3 awk.1
--- external/historical/nawk/bin/awk.1	23 Mar 2014 01:29:12 -0000	1.3
+++ external/historical/nawk/bin/awk.1	4 Apr 2015 15:48:53 -0000
@@ -485,7 +485,7 @@
 in the target string
 .Ar t .
 If
-.Ar s
+.Ar t
 is not given,
 .Va $0
 is used.