make clear that "the list" is not exhaustive

lichtkind++

Author: TimToady

S05-regex.pod

@@ -17,8 +17,8 @@ Synopsis 5: Regexes and Rules
 
     Created: 24 Jun 2002
 
-    Last Modified: 25 Feb 2012
-    Version: 153
+    Last Modified: 27 Feb 2012
+    Version: 154
 
 This document summarizes Apocalypse 5, which is about the new regex
 syntax.  We now try to call them I<regex> rather than "regular
@@ -1920,7 +1920,7 @@ calculating word properties of the preceding character.  See TR18 1.4.)
 
 =head2 Predefined Subrules
 
-These are the predefined subrules for any grammar or regex:
+These are some of the predefined subrules for any grammar or regex:
 
 =over