No need to save original_setcontents in fakeOn - it's already done in setUp.
No need to save original_setcontents in fakeOn - it's already done in setUp.

PyFilesystem/pyfilesystem,Konubinix/pyfilesystem,pmitros/pyfs,pombreda/pyfilesystem,zopyx/pyfilesystem,pmitros/pyfs,piranna/pyfilesystem,flying-circus/pyfilesystem