check_timestamp_unchanged (doc): bit of explanation on raised exception and how to use when another task creates the file.
check_timestamp_unchanged (doc): bit of explanation on raised exception and how to use when another task creates the file.

--HG--
extra : convert_revision : tzeentch.gm%40gmail.com-20111002110537-iattfp1bojig3gon

swayf/doit,okin/doit,okin/doit,okin/doit,swayf/doit,swayf/doit