diff --git a/graph_tools/parameters.py b/graph_tools/parameters.py
index c1843f27291784307428d27090c549fcb1a51096..e57cd6010720c6a9360f1471ecffa6feb4d4f9dd 100644
--- a/graph_tools/parameters.py
+++ b/graph_tools/parameters.py
@@ -75,6 +75,8 @@ def _init_():
     0
     >>> Necklace.graph(1).eval(EdgeColoring(3))
     6
+    >>> Necklace.graph(1).eval(EdgeColoring(4))
+    96
     >>> Necklace.graph(2).eval(EdgeColoring(3))
     12
     """
diff --git a/graph_tools/utils.py b/graph_tools/utils.py
index 076b6ad45cb76cd14b8c1873995cc7cacdd762b4..bd234ac160c0d38743539751bbc9a3aa7210eb2e 100644
--- a/graph_tools/utils.py
+++ b/graph_tools/utils.py
@@ -165,7 +165,7 @@ def _init_():
     """Tranform matrix formula l A^k r to simple formula.
 
     First rewrite A as P J P^-1 using Jordan normal form.
-    Then convert to formula using sage symolic expressions.
+    Then convert to formula using sage symbolic expressions.
 
     Sage (backed by Maxima) simplifies 0^x to 0 which is
     not correct because we need 0^0 == 1. So we check correctness