code: function indentation(value) {
    var index = 0
    var indent = 0
    var character = value.charAt(index)
    var stops = {}
    var size
  
    while (character === tab || character === space) {
      size = character === tab ? tabSize : spaceSize
  
      indent += size
  
      if (size > 1) {
        indent = Math.floor(indent / size) * size
      }
  
      stops[indent] = index
      character = value.charAt(++index)
    }
  
    return {indent: indent, stops: stops}
  }
docs: Gets indentation information for a line.