code: function annotateKeywords(keywords) {
          return keywords.map(function (t) {
              t.keyword = true;
              t.origin = "ecmascript";
              return t;
          });
      }
docs: /*
  Annotate a list of tokens as keywords
  
  @param {Array.<Object>} keyword - list of keyword tokens
  @return {Array.<Object>} - the input array; to each object in the array a
  new keyword {boolean} property has been added to indicate that the
  hint is a keyword.