This was causing issues for windows user with notepad2.

Fix trychange.py on python2.5.

R=dpranke@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/8038028

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@102797 0039d316-1c4b-4281-b951-d872f2087c98