Fix typos in 2-robot-and-boxes.md

data/part-14/2-robot-and-boxes.md

@@ -128,15 +128,15 @@ If the execution of the method has reached this point without returning, it is t
 
 ## Refactoring?
 
-Using only the grid to store the state of the game at all times is very handy in the sense that only one variable is permanently invlved in the whole process, and it is relatively easy to update the state of the grid through simple additions and subtractions.
+Using only the grid to store the state of the game at all times is very handy in the sense that only one variable is permanently involved in the whole process, and it is relatively easy to update the state of the grid through simple additions and subtractions.
 
 The downside is that it can be a tad difficult to understand the program code of the game. If someone unfamiliar with the logic used saw this following line of code, they would likely be a bit perplexed:
 
 ```python
             if self.map[box_new_y][box_new_x] in [1, 3, 5]:
 ```
 
-The code snippet above makes use of _magic numbers_ to represent the squares in the grid. ANyone reading the code would have to know that 1 means wall, 3 means a box and 5 means a box in a target square.
+The code snippet above makes use of _magic numbers_ to represent the squares in the grid. Anyone reading the code would have to know that 1 means wall, 3 means a box and 5 means a box in a target square.
 
 The lines involving the clever subtractions and additions would look even more baffling: