punctuation error: "function's" -> "functions"

Reference: /n/sources/patch/applied/man-manpage
Date: Fri Mar 11 22:11:07 CET 2005

--- /sys/man/1/man	Fri Mar 11 22:10:42 2005
+++ /sys/man/1/man	Fri Mar 11 22:10:41 2005
@@ -69,7 +69,7 @@
 .PP
 .B Sig
 prints the signature (i.e. C definition) of the
-.IR function 's
+.IR functions
 given on the command line.
 .SH FILES
 .TF /sys/lib/man/lookman/index