3 TODO: Better documentation here. For the time being, see:
5 Priedhorsky, R., Chen, J., Lam, S. T. K., Panciera, K., Terveen, L., &
6 Riedl, J. (2007, November). Creating, destroying, and restoring value in
7 Wikipedia. In Proceedings of the 2007 international ACM conference on
8 Supporting group work (pp. 259-268). ACM.
12 class DUMMY_SHA1: pass
14 Used in when checking for reverts when the checksum of the revision of interest
17 >>> DUMMY_SHA1 in {"aaa", "bbb"} # or any 40 character hex
20 >>> DUMMY_SHA1 == DUMMY_SHA1
22 >>> {DUMMY_SHA1, DUMMY_SHA1}
23 {<class '__main__.DUMMY_SHA1'>}