and generate invalid calls to the optimisers.
Previously ego would generate a temporary file template that looked like
/tmp/ego.A.BB.XXXXXX, call mktemp() on it to randomise the XXXXXX, and then
replace A and BB with data.
However, it used strrchr to find the A and B. Which would fine, except when
mktemp produced an A or a B in the randomised part...
This code was written on 4 March 1991. I was 16.
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