Racy Git

[richardjennings]

Tests intermittently fail when run on Linux. I discovered that the test case filesystem changes sometimes do not result in a change in modification timestamp. When the modification timesteamp has not changed, the timestamp comparison does not detect a change between the working directory and the index and as a result the tests fail.

This I found out is called the Racy Git problem and is discussed:

https://mirrors.edge.kernel.org/pub/software/scm/git/docs/technical/racy-git.txt