code: function stringifyDefectLocation_(defect) {
          var location = defect.location;
  
          if(location) {
              return util.format('%d:%d\n%s\n%s', location.line, location.column, location.sourceLine,
                  new Array(location.column).join('-') + '^'
              );
          }
  
          return '';
      }
docs: Returns formatted error location:
  @example
  /home/foo/bar.js: 5
  if (Array.isArray(x) res.push('baz');
  -----------------------^
  
  @param {Defect} defect
  
  @returns {String}