// supports the usual quotings (', ", variable length double brackets)
static boolean isQuoted(S s) {
  ifdef isQuoted_quickAndDirty
  if (isQuoted_quickAndDirty(s)) true;
  endifdef
  ifndef isQuoted_quickAndDirty
  if (isNormalQuoted(s)) true; // use the exact version
  endifdef
  ret isMultilineQuoted(s);
}