Touchup javadocs

src/main/java/duke/command/CommandSort.java

@@ -9,7 +9,7 @@
 import task.TaskList;
 
 /**
- * Command to sort the task list
+ * Command to sort the task list.
  */
 public class CommandSort extends Command {
 
@@ -23,14 +23,15 @@ public class CommandSort extends Command {
      * @param sortFilters Un-parsed list of filters.
      */
     public CommandSort(TaskList taskList, String sortFilters) {
-        this.commandName = "sort /name /date";
+        this.commandName = "sort";
         this.description = "Sorts list based on arguments provided. Having no arguments would default to"
                 + " sorting by /name. If there is more than 1 argument, the list will be sorted by the first."
                 + "followed by the second, etc...";
         this.arguments = new String[]{
             "/name Optional argument to sort by name",
             "/date Optional argument to sort by date",
-            "/done Optional argument to sort by completion status"
+            "/done Optional argument to sort by completion status",
+            "/added Optional argument to sort by added-by date"
         };
 
         this.taskList = taskList;

src/main/java/task/TaskDeadline.java

@@ -36,7 +36,7 @@ public TaskDeadline(String description, LocalDate date, String time, boolean don
     }
 
     /**
-     * Return string representation of Deadline.
+     * Returns string representation of Deadline.
      *
      * @return Deadline display.
      */

src/main/java/task/TaskEvent.java

@@ -35,7 +35,7 @@ public TaskEvent(String description, LocalDate date, String time, boolean done,
     }
 
     /**
-     * Return string representation of Event.
+     * Returns string representation of Event.
      *
      * @return Event display.
      */