Fix a Python 3 incompatible regression.

jmchilton · jmchilton · commit 2f66fc34e676 · 2015-11-20T12:01:39.000Z
diff --git a/planemo/io.py b/planemo/io.py
@@ -7,7 +7,7 @@
 import sys
 import tempfile
 import time
-from cStringIO import StringIO
+from six import StringIO
 from xml.sax.saxutils import escape
 
 import click
