code: func (u *UI) LineIndent(indent int, format string, a ...interface{}) {
  	o := fmt.Sprintf(format, a...)
  	fmt.Fprintln(readline.Stdout, ansiwrap.WrapIndent(o, u.Cols, u.Indent, u.Indent+indent))
  }
docs: // LineIndent writes a formatted string followed by a newline to stdout. Output
  // is word wrapped, and terminated by a newline. All lines after the first are
  // indented by indent number of spaces (in addition to the indenting enforced
  // by this UI instance.