code: def fill(self, text=""):
          "Indent a piece of text, according to the current indentation level"
          self.f.write(self.line_marker + "    " * self._indent + text)
          self.line_marker = "\nf fill(self, text=""):
          "Indent a piece of text, according to the current indentation level"
          self.f.write(self.line_marker + "    " * self._indent + text)
          self.line_marker = "\n"
docs: Indent a piece of text, according to the current indentation level