message: [XLA] Dump as text if only --xla_dump_to is specified.
  This was the intended behavior, but it wasn't working; instead, we'd dump
  nothing.
diff: @@ -78,7 +78,7 @@ struct CanonicalDebugOptions {
  return RE2::PartialMatch(string(module_name), pattern);
  };
  } else if (!opts.xla_dump_hlo_pass_re().empty() ||
  - output_format_specified) {
  + !opts.xla_dump_to().empty() || output_format_specified) {
  should_dump_module = [](string_view) { return true; };
  } else {
  should_dump_module = [](string_view) { return false; };
  