From db1c8dd79f86932e6bbf83273c443cf6ddab550a Mon Sep 17 00:00:00 2001
From: Jussi Pakkanen <jpakkane@gmail.com>
Date: Sun, 14 Jun 2015 14:26:00 +0300
Subject: Fix error message argument passing. Fixes #147.

---
 interpreter.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/interpreter.py b/interpreter.py
index 49739e4..89df630 100644
--- a/interpreter.py
+++ b/interpreter.py
@@ -986,8 +986,8 @@ class Interpreter():
     def validate_arguments(self, args, argcount, arg_types):
         if argcount is not None:
             if argcount != len(args):
-                raise InvalidArguments('Expected %d arguments, got %d',
-                                       argcount, len(args))
+                raise InvalidArguments('Expected %d arguments, got %d.' %
+                                       (argcount, len(args)))
         for i in range(min(len(args), len(arg_types))):
             wanted = arg_types[i]
             actual = args[i]
-- 
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