The trailing comma is supported in MPW and GCC. It fixes the formatting
issue with clang-format and makes cleaner diffs, so trailing commas have
been added to enums and clang-format has been run over the sources.
This simplifies the conversion test, since we don't need to be careful
about which data we run the conversion test in. It will also simplify
the command-line conversion tool and its distribution. The classic Mac
OS version of this program will continue to embed conversion tables in
the resource fork.