Update JSDoc and a minor documentation fix.

gulp/jsdoc

@@ -1 +1 @@
-Subproject commit b6f36edba33690cee908cadcb24515ec5be97b1d
+Subproject commit 59faf79f13765dfd1fd8ec302d5627bbe548b2fa

src/path/PathItem.js

@@ -38,26 +38,27 @@ var PathItem = Item.extend(/** @lends PathItem# */{
          * sub-paths.
          *
          * @name PathItem.create
+         * @function
          * @param {String} pathData the SVG path-data to parse
          * @return {Path|CompoundPath} the newly created path item
          */
-
         /**
          * Creates a path item from the given segments array, determining if the
          * array describes a plain path or a compound-path with multiple
          * sub-paths.
          *
          * @name PathItem.create
+         * @function
          * @param {Number[][]} segments the segments array to parse
          * @return {Path|CompoundPath} the newly created path item
          */
-
         /**
          * Creates a path item from the given object, determining if the
          * contained information describes a plain path or a compound-path with
          * multiple sub-paths.
          *
          * @name PathItem.create
+         * @function
          * @param {Object} object an object containing the properties describing
          *     the item to be created
          * @return {Path|CompoundPath} the newly created path item

src/util/Numerical.js

@@ -73,6 +73,7 @@ var Numerical = new function() {
     }
 
     function getDiscriminant(a, b, c) {
+        // d = b^2 - a * c  computed accurately enough by a tricky scheme.
         // Ported from @hkrish's polysolve.c
         function split(v) {
             var x = v * 134217729,