b2/: rename "again" to "continue"

b2/SUBST

@@ -8,7 +8,7 @@ BAR=x	/* BAR= wouldn't be syntactically correct. We need a non-empty value */
 FOO=(*)(?) {
 	BAR=$BAR$2
 	FOO=$1
-	again FOO
+	continue FOO
 }
 BAR=x(*) { $=$1 }	/* remove the "x" */
 
@@ -18,7 +18,7 @@ REF=R[0-9]* {
 	TOL <= 5%
 	FN=*% { TOL<=$$ }
 	break REF
-//	end break again ignore
+//	end break continue ignore
 }
 
 /*