Fix some phrasing on the 09_Extra section (RedHat-Israel#420)

Author: sleviim

docs/course_materials/exercises/09_Extra/class_exercise_1_solution.py

@@ -13,8 +13,8 @@ def joing_files(file_name1, file_name2, out_file_name):
         print('Reading or writing error with one of the files!')
 
 
-file_name_1 = input("Enter the first file name:  ")
-file_name_2 = input("Enter the secound file name:  ")
-file_name_3 = input("Enter the thired file name: ")
+file_name_1 = input("Enter the first file name: ")
+file_name_2 = input("Enter the second file name: ")
+file_name_3 = input("Enter the third file name: ")
 
 joing_files(file_name_1, file_name_2, file_name_3)

docs/course_materials/exercises/09_Extra/homework.md

@@ -3,31 +3,36 @@
 ### is_palindrome.py
 
 - Create a file *is_palindrome.py*
-- A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward
-- for example: "147741"
-- Another example: "Was it a cat I saw?"
+
+- A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward.
+- For example: "147741"
+  Another example: "Was it a cat I saw"
+- Write a Python function that gets a string from the user.
+  The function returns `True` if the input is a palindrome.
+  Otherwise, return `False`.
 
 ## sum_list.py
 
 - Create a file *sum_list.py*
-- Write a Python function to sum all the numbers in a list
-- Run the function with the list [1,2,7,8,48]
+
+- Write a Python function that sums all the numbers in a list of numbers.
+- Run the function on the list [1, 2, 7, 8, 48]
+Expected output: 66
 
 ### multiply_list.py
 
 - Create a file *multiply_list.py*
-- Write a Python function to multiply all the numbers in a list
-- Run the function with the list [8, 2, 3, -1, 7]
-Expected Output : -336 
-
-### dates.py
 
-- Create a file *sundays.py*
-- Write a Python program that print yesterday, today, tomorrow dates (use datetime module)
+- Write a Python function that multiples all the numbers in a list of numbers.
+- Run the function on the list [8, 2, 3, -1, 7]
+Expected Output : -336
 
-### sundays.py
+### dates.py
 
-Write a Python program that get a specific year and print all the Sundays dates of that year (use datetime module)
+- Create a file *dates.py*
 
+- Write a Python program that prints the dates of yesterday, today, tomorrow (use datetime module)
 
+### sundays.py
 
+Write a Python program that gets a specific year and print all the Sundays' dates of that year (use datetime module)