makeinfo on FreeBSD before 10.x does not support @geq.

--- doc/rcs.texi.orig	2013-10-20 08:17:42.000000000 +0000
+++ doc/rcs.texi	2014-03-08 19:08:44.068269980 +0000
@@ -1789,7 +1789,7 @@
 If empty, the default branch is the highest branch on the trunk.
 
 All @code{delta} nodes whose numbers consist of 2@var{n} fields (@var{n}
-@geq{} 2) (e.g., 3.1.1.1, 2.1.2.2) are linked as follows.
+>= 2) (e.g., 3.1.1.1, 2.1.2.2) are linked as follows.
 All nodes whose first 2@var{n}@minus{}1 number fields are identical are
 linked through the @code{next} field in order of increasing numbers.
 For each such sequence, the @code{delta} node whose number is identical