>> It looks like the test/indent tests are only good for null-diff
>> general indentation rules.

> What makes you think so?

When the diff outputs differences (ie a non null-diff), how does the
current test/indent distinguish expected from unexpected? If there
was a test/indent/ruby.rb.expected file (for example), then I could
see how it could do so: 'diff ruby.rb.expected ruby.rb.new' returns
nothing.