code: function determineTabs(line, tab){
  
    let tabs = '';
    for (let i = 0; i < line.depth; i++) {
      tabs += tab;
    }
  
    return tabs;
  }
docs: Determines spaces for a line
  @param {object} line Line object
  @param {string} tab A tab in spaces
  @returns {string} Returns a string of spaces