Updated some errors mentioned by the bot

src/main/java/list/TaskList.java

@@ -97,7 +97,7 @@ public Task markTask(int i) throws DukeException {
     }
 
     /**
-     * UnMark a task as done.
+     * Marking the task as unmarked.
      *
      * @param i The index of the task.
      * @return The task that is unmarked.

src/main/java/parser/Parser.java

@@ -22,9 +22,6 @@
  * The parser that takes the input data and checks its syntax followed bt execute it.
  */
 public class Parser {
-
-    //final String UNKNOWN_COMMAND = "☹ OOPS!!! I'm sorry, but I don't know what that means :-(";
-
     /**
      * Takes the user input and calls the right command for it.
      *

src/main/java/tasks/Task.java

@@ -6,7 +6,7 @@
 public class Task {
     private String type;
     private String name;
-    private boolean marked;
+    private boolean isMarked;
     private boolean isEmpty = false;
 
     /**
@@ -15,7 +15,7 @@ public class Task {
      */
     public Task(String name) {
         this.name = name;
-        this.marked = false;
+        this.isMarked = false;
     }
     public Task() {
         this.isEmpty = true;
@@ -31,14 +31,14 @@ public void setType(String type) {
      * Marks a task as marked.
      */
     public void markDone() {
-        marked = true;
+        isMarked = true;
     }
 
     /**
      * UnMarks a task.
      */
     public void unmarkDone() {
-        marked = false;
+        isMarked = false;
     }
     /**
      * Represent the task in String.
@@ -48,6 +48,6 @@ public void unmarkDone() {
     @Override
     public String toString() {
         assert !type.equals(" ") : "Type must be a character related to its task type";
-        return "  [" + type + "]" + "[" + (marked ? "X" : " ") + "] " + name;
+        return "  [" + type + "]" + "[" + (isMarked ? "X" : " ") + "] " + name;
     }
 }

src/main/java/ui/Ui.java

@@ -111,7 +111,6 @@ public String showClearTask() {
      * @param userList The list the task is from.
      */
     public String showList(TaskList userList) {
-        //System.out.println(lineBreak);
         StringBuilder builder = new StringBuilder();
         String top = ("Here are the tasks in your list:");
         for (int i = 0; i < userList.size(); i++) {