Merge pull request #173 from hyanwong/patch-3

Correct call to sc2ts TreeInfo in utils.py

Author: jeromekelleher

sc2ts/utils.py

@@ -1553,7 +1553,7 @@ def sort_mutation_label(s):
                 return np.inf  # put at the end
 
     if ti is None:
-        ti = sc2ts.TreeInfo(ts)
+        ti = TreeInfo(ts)
     if node_size is None:
         node_size = 2800
     if edge_font_size is None: