typo in multilines.dot

Author: fchapoton

tests/testgraphs/multilines.dot

@@ -1,4 +1,4 @@
-/* Test multilineattributes and concatination */
+/* Test multilineattributes and concatenation */
 digraph G {
 	a [label="This is\
 a multiline\
@@ -8,4 +8,4 @@ style=filled];
 	b [label="partA" + "partB"+
 	"partC"];	
 	a -> b -> c;
-}
+}