Nanako Shiraishi [off-list ref] writes:
The fourth test of show-branch in t1200 test was failing but only
sometimes. It only failed when two commits created in an earlier
test had different timestamps. When they were created within the
same second, the actual output matched the expected output.
Ahh, I actually saw this breakage once, suspected it would be something
like that, but didn't have enough energy/time to dig into it myself.
Thanks.