Git with broken hash generation to generate collisions between object IDs. Don't use this! https://undefinedbehavior.de/posts/commit-vandalism/

Paul Mackerras a823a91131 Handle the case of a parent being listed twice in a merge. ... This happens in the linux-2.6 tree. We draw the graph line double-thick to show that this happened. Also fix a bug where we got a bogus "No commit information available" line at the end on simple repositories like this one.		2005-06-21 10:01:38 +10:00
gitk	Handle the case of a parent being listed twice in a merge.	2005-06-21 10:01:38 +10:00