docs: def do_indent(s, width=4, indentfirst=False):
      """Return a copy of the passed string, each line indented by
      4 spaces. The first line is not indented. If you want to
      change the number of spaces or indent the first line too
      you can pass additional parameters to the filter:
  
      .. sourcecode:: jinja
  
          {{ mytext|indent(2, true) }}
              indent by two spaces and indent the first line too.
      """
      indention = u' ' * width
      rv = (u'\n' + indention).join(s.splitlines())
      if indentfirst:
          rv = indention + rv
      return rv