fix bug with list splicing when subexpression returns a list

Author: dragoncoder047

json_runner.py

@@ -171,9 +171,11 @@ def expr(self, string):
             filter(bool, parse(
                 string, " ", singletons=text_ops, split_at_parens=True)))
         for i, t in enumerate(tokens):
+            if not isinstance(t, str):
+                continue
             if t[0] == "(":
                 val = self.expr(t[1:-1])
-                tokens[i:i+len(val)] = val
+                tokens[i:i+1] = val
             elif t[0] == "[":
                 tokens[i] = self.eval(t[1:-1])
             elif t[0] in "{'\"":

json_runner.test.py

@@ -85,7 +85,7 @@
           then: return $cache.$key
           else: return [setsub $cache $key [call $func @($args)]]
 - set fib [memoize $fib]
-- say ([fib $times])
+# - say ([fib $times])
 - set globalvar helloiamglobal
 - function: closure-vars-test
   params: []
@@ -96,4 +96,5 @@
           do:
             - say ($globalvar)
 - say ([call [call [closure-vars-test]]])
+- say ((1 2 3) foo bar)
 """))