code: function(text, from) {
  			var len = text.length,
  				start = 0,
  				end = len - 1;
  			
  			// search left
  			for (var i = from - 1; i > 0; i--) {
  				var ch = text.charAt(i);
  				if (ch == '\n' || ch == '\r') {
  					start = i + 1;
  					break;
  				}
  			}
  			// search right
  			for (var j = from; j < len; j++) {
  				var ch = text.charAt(j);
  				if (ch == '\n' || ch == '\r') {
  					end = j;
  					break;
  				}
  			}
  			
  			return require('range').create(start, end - start);
  		}
docs: Find start and end index of text line for <code>from</code> index
  @param {String} text
  @param {Number} from