Don't pre-expand programs passed to interpreter

.gitignore

@@ -21,6 +21,8 @@ notes
 /.idea/
 /results
 /temp
+*~
+q
 
 # Don't commit the data directory that we'll
 # use to hold the data from

src/propeller/push/interpreter.cljc

@@ -42,7 +42,7 @@
   the returned state will include the key :history with a value that is a
   vector containing all states prior to the final state."
   [program start-state step-limit]
-  (loop [state (assoc start-state :exec program :step 1)
+  (loop [state (assoc start-state :exec (list program) :step 1)
          history []]
     (if (or (empty? (:exec state))
             (> (:step state) step-limit))