code: function highlightString(str, indexes){
  
      // If there's nothing to do, return immediately
      if(!indexes || !indexes.length) return str;
  
      var out = '';
  
      // Loop through string one character at a time, highlighting as necessary
      for(var i = 0; i < str.length; i += 1){
        out += indexes.indexOf(i) !== -1 ? str.charAt(i).bold() : str.charAt(i);
      }
      return out;
    }
docs: ## highlightString
  
  Highlights the characters at given indices in a string
  
  @param {string} str String to highlight
  @param {array} indexes Array of indices to make bold
  @return {string} HTML of string with given characters made bold