Repeat loop requires plain number, transformed vector, or transformed variable

examples/loops/loop_repeat.cir

@@ -1,10 +1,21 @@
 example repeat loop
 .control
-
+* plain number
+repeat 3
+  echo How many loops? Count yourself!
+end
+echo
+* variable
 set loops = 7
 repeat $loops
   echo How many loops? $loops
 end
+echo
+* vector
+let loopvec = 4
+repeat $&loopvec
+  echo How many loops? $&loopvec
+end
 
 .endc