code: function pad(value, level) {
    var values = value.split(lineFeed)
    var index = values.length
    var padding = repeat(space, level * tabSize)
  
    while (index--) {
      if (values[index].length !== 0) {
        values[index] = padding + values[index]
      }
    }
  
    return values.join(lineFeed)
  }
docs: Pad `value` with `level * tabSize` spaces.  Respects lines.  Ignores empty lines.