sS dropFirstSpacedColumns(int n, S text) {
  S re = "^\\s*" + repString(n, "\\S+\\s*");
  ret mapEachLine(text, line -> regexpReplace_direct(line, re, ""));
}

static IF1<S> dropFirstSpacedColumns(int n) {
  ret text -> dropFirstSpacedColumns(n, text);
}