fix doctests on py2.4 and py2.5
fix doctests on py2.4 and py2.5

Fixes issue 5. Thanks to andre at ae-36 dot net for reporting the issue
and writing a patch. I chose a slightly different solution.

git-svn-id: be2f10af6a8ae3de04d0af15114ce5d7c2b72429@36 22607858-6fb5-3b0b-32ac-9b2939425112

CygnusNetworks/pypureomapi