svoid assertJavaSourceEqualsVerbose_v2(S msg default "", S src, LS tok) {
  LS tokens1 = javaTokC(src), tokens2 = codeTokens(tok);
  int iDiff = indexOfDifference(tokens1, tokens2);
  if (iDiff < 0) print(msg, "OK: \n" + join(tok));
  else {
    print(sfu(tok));
    fail(prependWithColonSpace(msg) + "Error in token " + iDiff + " (" + get(tokens1, iDiff) + "/" + get(tokens2, iDiff) + "):\n"
      + "= got =\n"
      + join(tok) + "\n"
      + "= expected =\n"
      + src);
  }
}

Began life as a copy of #1031313