A full list of descriptions of the mutants generated by Jamie Andrews'
"mutgen" tool is found in file "mutant-descs.txt".  Each line in that file
corresponds to one mutant description.  On each line, the part before the
first colon is the line number in "concordance.cc" that would have to be
changed, and the part after the first colon is the replacement (mutated)
line.

Each of the 200 .cc.gz files in this directory represents a mutant,
randomly chosen from that file, that compiles.

