fix misleading error message in simple_cnf

diff --git a/src/simple_cnf.py b/src/simple_cnf.py
index 25cb52e..1538983 100644 (file)
--- a/src/simple_cnf.py
+++ b/src/simple_cnf.py
@@ -632,7 +632,7 @@ class SimpleCnf(object):
         :rtype: {str, int or str or None}
         """
         if len(self) != 1:
-            raise ValueError('get_value only possible if len == 1 (is {0})!'
+            raise ValueError('get_single_dict only possible if len == 1 (is {0})!'
                              .format(len(self)))
         return self.__cnfvars[0]