Fix typo

Author: itziakos

tox.ini

@@ -39,7 +39,7 @@ commands =
     python -m haas.__main__ haas
 
 [testenv:cp26]
-# Python 2.6 needs some handfolding to run the entry points using the
+# Python 2.6 needs some handholding to run the entry points using the
 # `-m` option.
 install_command = python -m pip.__main__ install -q {packages}
 commands =