Address comments

Author: minggangw

lib/node.js

@@ -1062,7 +1062,7 @@ class Node extends rclnodejs.ShadowNode {
   }
 
   /**
-   * Get the number of client on a given service name.
+   * Get the number of clients on a given service name.
    * @param {string} serviceName - the service name
    * @returns {Number}
    */
@@ -1071,7 +1071,7 @@ class Node extends rclnodejs.ShadowNode {
   }
 
   /**
-   * Get the number of client on a given service name.
+   * Get the number of services on a given service name.
    * @param {string} serviceName - the service name
    * @returns {Number}
    */

lib/publisher.js

@@ -74,7 +74,7 @@ class Publisher extends Entity {
   }
 
   /**
-   * Get the number of subscription to this publisher.
+   * Get the number of subscriptions to this publisher.
    * @returns {number} The number of subscription
    */
   get subscriptionCount() {