message: Ignore properties that being with an '_' when comparing ASTs.
diff: @@ -512,6 +512,12 @@ function findChildReprints(newPath, oldPath, reprints) {
  var originalReprintCount = reprints.length;
  for (var k in keys) {
  + if (k.charAt(0) === "_") {
  + // Ignore "private" AST properties added by e.g. Babel plugins and
  + // parsers like Babylon.
  + continue;
  + }
  +
  newPath.stack.push(k, types.getFieldValue(newNode, k));
  oldPath.stack.push(k, types.getFieldValue(oldNode, k));
  var canReprint = findAnyReprints(newPath, oldPath, reprints);
  