Vendor things

third-party/vendor/regex-automata-0.1.10/data/tests/fowler/README

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+Test data was taken from the Go distribution, which was in turn taken from the
+testregex test suite:
+
+  http://www2.research.att.com/~astopen/testregex/testregex.html
+
+Unfortunately, the above link is now dead, but the test data lives on.
+
+The LICENSE in this directory corresponds to the LICENSE that the data was
+originally released under.
+
+The tests themselves were modified for RE2/Go. A couple were modified further
+by me (Andrew Gallant) (only in repetition.dat) so that RE2/Go would pass them.
+(Yes, it seems like RE2/Go includes failing test cases.) This may or may not
+have been a bad idea, but I think being consistent with an established Regex
+library is worth something.
+
+After some number of years, these tests were transformed into a JSON format
+using the fowler-to-json script in this directory, e.g.,
+
+  ./fowler-to-json basic.dat > basic.json
+
+which brings them into a sensible structured format in which other tests can
+be written.