Fix how some styles are documented.

src/contourFeature.js

@@ -26,6 +26,8 @@ var meshFeature = require('./meshFeature');
  *    This defaults to the `z` property of the data elements.  If the value of
  *    a grid point is `null` or `undefined`, the point and elements that use
  *    that point won't be included in the results.
+ * @property {number|function} [opacity=1] The opacity for the whole feature on
+ *    a scale of 0 to 1.
  */
 
 /**

src/feature.js

@@ -43,8 +43,6 @@ var geo_event = require('./event');
  * Style specification for a feature.
  *
  * @typedef {object} geo.feature.styleSpec
- * @property {number|function} [opacity=1] The opacity for the whole feature on
- *    a scale of 0 to 1.
  */
 
 /**
@@ -837,7 +835,7 @@ var feature = function (arg) {
     }
     m_style = $.extend(
       {},
-      {'opacity': 1.0},
+      {opacity: 1.0},
       arg.style === undefined ? {} : arg.style);
     m_this._bindMouseHandlers();
     m_ready = true;

src/isolineFeature.js

@@ -510,8 +510,8 @@ var isolineFeature = function (arg) {
   };
 
   /**
-   * When the feature is marked as modified, mark our sub-feature as
-   * modified, too.
+   * Update the timestamp to the next global timestamp value.  Mark
+   * sub-features as modified, too.
    *
    * @returns {object} The results of the superclass modified function.
    */

src/polygonFeature.js

@@ -401,8 +401,8 @@ var polygonFeature = function (arg) {
   };
 
   /**
-   * When the feature is marked as modified, mark our sub-feature as
-   * modified, too.
+   * Update the timestamp to the next global timestamp value.  Mark
+   * sub-features as modified, too.
    *
    * @returns {object} The results of the superclass modified function.
    */