1.0.10dev: fix detection of Python version in AppVeyor helper script.
1.0.10dev: fix detection of Python version in AppVeyor helper script.



git-svn-id: 50cd48c816abc7a9f40e8e03a4277466cb30a3e4@14473 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac