Correction of broken test file by error message change

test/test_assertion_error.py

@@ -71,5 +71,5 @@ def test_error_invalid_window(platform_multiC) :
     for i in range(len(invalid_windows_list)):
         invalid_window = invalid_windows_list[i]
         make_error_file(3, invalid_window)
-        out_dir = error_user("dm_user_multi_behavior_invalid_windows_"+str(i),platform_multiC, "should be an array containing only array of int of size 2")
+        out_dir = error_user("dm_user_multi_behavior_invalid_windows_"+str(i),platform_multiC, "should be an array of intervals (pairs of integers)")