Add Task headers

Author: kochaika

Loops/Break keyword/task.md

@@ -7,6 +7,7 @@ escape the loop.
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6302#break).
 
+### Task
 Write a condition to exit the loop on its third iteration after evaluating if `animal`
 is equal to `elephant`.  Use the `break` statement.  The `zoo` list in the end should contain 
 only `lion` and `tiger` (because you `pop` all the other ones in the loop).

Loops/Continue keyword/task.md

@@ -7,6 +7,7 @@ the `else` clause is executed if it is present.
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6302#continue).
 
+### Task
 Print only the odd numbers `1, 3, 5, 7, 9`.  
 
 <div class='hint'>Use the <code>%</code> operator to check if <code>x</code> is even.</div>

Loops/Else with loops/task.md

@@ -36,6 +36,7 @@ is completed (unless there was a `break` in there somewhere).
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6302).
 
+### Task
 In the code editor, add two lines of code to the second loop to make sure the loop only prints
 numbers 1 and 2 and never prints the phrase `"for loop is done"`.
 

Loops/For loop/task.md

@@ -10,6 +10,7 @@ You can read more about the `for` statement on <a href="https://docs.python.org/
 
 For more structured and detailed information, you can also refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6065).
 
+### Task
 Print each prime number from the `primes` list using the `for` loop. A prime 
 number is a natural number greater than `1` that has no positive divisors 
 other than `1` and itself.  

Loops/List Comprehension/task.md

@@ -30,6 +30,7 @@ List comprehensions are also more efficient computationally than a `for` loop.
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6315).
 
+### Task
 In the code editor, use list comprehension to build `my_efficient_list` from the elements of `my_inefficient_list`
 by adding $10$ to each of them. For example, the first element of `my_inefficient_list` is $1 + 10 = 11$,
 so the first element of `my_efficient_list` should be $11 + 10 = 21$, and so on.

Loops/Loop over a string/task.md

@@ -3,6 +3,7 @@
 As we discussed earlier, strings in Python are in many ways similar to lists. 
 You can iterate over a string just like you would iterate over a list.  
 
+### Task
 Use a loop to count how many characters `hello_world` contains. Store 
 this number in the variable `length`.  
 

Loops/Nested for Loop/task.md

@@ -31,6 +31,7 @@ For example, a [`while` loop](course://Loops/While loop) (see further) can be ne
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/6065#nested-loop).
 
+### Task
 You are given a tic-tac-toe board of 3x3, your task is to print every position. Coordinates along each side
 are stored in the list `coordinates`. The output should be:
 ```text

Loops/While loop/task.md

@@ -6,6 +6,7 @@ code for as long as the condition is `True`.  If the expression is `False`, the
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/5940).
 
+### Task
 Print all squares from `1` to `9`  `(1, 4, ... , 81)`. Use the `number` variable in a
 `while` loop.