Fixes for typos and formatting errors in classes and classes concept exercise.

Author: BethanyG

concepts/classes/about.md

@@ -185,10 +185,10 @@ class Demo:
 The moment that `<object>.add_two()` is called, and `self.new_var += 2` is read, `new_var` changes from a class variable to an instance variable of the same name.
 
 This can be useful during initialization when all instances of a class will need some attribute(s) to start with the same value.
-However, the instance variable then shadows* the class variable, making the class variable inaccessible from the instance where it is shadowed.
+However, the instance variable then [_shadows_](https://oznetnerd.com/2017/07/17/python-shadowing/) the class variable, making the class variable inaccessible from the instance where it is shadowed.
 Given this situation, it may be safer and clearer to set instance attributes from the `__init__()` method as `self.<attribute>`.
 ~~~~
-_*[_shadows_][shadowing]
+
 
 ## Methods
 
@@ -240,7 +240,7 @@ class MyClass:
     def change_location(self, amount):
         self.location_x += amount
         self.location_y += amount
-        return  self.location_x, self.location_y
+        return self.location_x, self.location_y
 
 # Make a new test_object with location (3,7)
 >>> test_object = MyClass((3,7))
@@ -267,7 +267,7 @@ class MyClass:
     def change_location(self, amount):
         self.location_x += amount
         self.location_y += amount
-        return  self.location_x, self.location_y
+        return self.location_x, self.location_y
 
     # Alter class variable number for all instances from within an instance.
     def increment_number(self):
@@ -322,4 +322,3 @@ class MyClass:
 [dunder]: https://mathspp.com/blog/pydonts/dunder-methods
 [oop]: https://www.educative.io/blog/object-oriented-programming
 [dot notation]: https://stackoverflow.com/questions/45179186/understanding-the-dot-notation-in-python
-[shadowing]: https://oznetnerd.com/2017/07/17/python-shadowing/

exercises/concept/ellens-alien-game/.docs/hints.md

@@ -20,7 +20,7 @@
 ## 4. The `teleport` Method
 
 - Remember that `object methods` are always passed `self` as the first parameter.
-- Instance attributes can be updated from a method by using `self.<attribute>` = `<new attribute value>`.
+- Instance attributes can be updated from a method by using `self.<attribute> = <new attribute value>`.
 
 ## 5. The `collision_detection` Method
 
@@ -39,4 +39,4 @@
 - A `tuple` would be a _single_ parameter.
 - The Alien constructor takes _2 parameters_.
 - Unpacking what is _inside_ the tuple would yield two parameters.
-- The standalone function is outside of the `class`
+- The standalone function is outside of the `class`.

exercises/concept/ellens-alien-game/.docs/instructions.md

@@ -31,9 +31,9 @@ It is up to you if `hit()` takes healths points _to_ or _below_ zero.
 
 ```python
 >>> alien = Alien(0, 0)
->>> alien.health
 
 # Initialized health value.
+>>> alien.health
 3
 
 # Decrements health by 1 point.
@@ -103,8 +103,8 @@ For example:
 2
 >>> alien_one.total_aliens_created
 2
->>> Alien.total_aliens_created
 # Accessing the variable from the class directly
+>>> Alien.total_aliens_created
 2
 ```
 
@@ -120,7 +120,7 @@ For example:
 >>> aliens = new_aliens_collection(alien_start_positions)
 ...
 >>> for alien in aliens:
-    	print(alien.x_coordinate, alien.y_coordinate)
+...     print(alien.x_coordinate, alien.y_coordinate)
 (4, 7)
 (-1, 0)
 ```

exercises/concept/ellens-alien-game/.docs/introduction.md

@@ -182,7 +182,7 @@ class MyClass:
     def change_location(self, amount):
         self.location_x += amount
         self.location_y += amount
-        return  self.location_x, self.location_y
+        return self.location_x, self.location_y
 
 # Make a new test_object with location (3,7)
 >>> test_object = MyClass((3,7))
@@ -209,7 +209,7 @@ class MyClass:
     def change_location(self, amount):
         self.location_x += amount
         self.location_y += amount
-        return  self.location_x, self.location_y
+        return self.location_x, self.location_y
 
     # Alter class variable number for all instances from within an instance.
     def increment_number(self):

exercises/concept/ellens-alien-game/.meta/exemplar.py

@@ -6,9 +6,9 @@ class Alien:
 
     Attributes:
         (class) total_aliens_created (int): Total number of Alien instances.
-        x_coordinate (int):  Position on the x-axis.
+        x_coordinate (int): Position on the x-axis.
         y_coordinate (int): Position on the y-axis.
-        health (int):  Number of health points.
+        health (int): Number of health points.
 
     Methods:
         hit(): Decrement Alien health by one point.
@@ -29,9 +29,9 @@ def __init__(self, x_coordinate, y_coordinate):
             health (int):  Number of health points.
 
         Attributes:
-            x_coordinate (int):  Position on the x-axis.
+            x_coordinate (int): Position on the x-axis.
             y_coordinate (int): Position on the y-axis.
-            health (int):  Number of health points. Defaults to 3.
+            health (int): Number of health points. Defaults to 3.
 
         Returns:
             Alien (Alien Object): New Alien.
@@ -59,7 +59,7 @@ def is_alive(self):
         """Return if the Alien is alive.
 
         Returns:
-            bool:  Is the Alien Alive?
+            bool: Is the Alien Alive?
         """
 
         return self.health > 0
@@ -94,11 +94,11 @@ def collision_detection(self, other):
 def new_aliens_collection(positions):
     """Create a list of Alien instances from a list of coordinate tuples.
 
-     Parameters:
-        positions (list[tuple]): List of (x, y) coordinates in tuples..
+    Parameters:
+        positions (list[tuple]): List of (x, y) coordinates in tuples.
 
-     Returns:
-         list[object]: List of Alien objects.
+    Returns:
+        list[object]: List of Alien objects.
      """
 
     return [Alien(position[0], position[1]) for position in positions]

exercises/concept/ellens-alien-game/classes.py

@@ -6,9 +6,9 @@ class Alien:
 
     Attributes:
         (class) total_aliens_created (int): Total number of Alien instances.
-        x_coordinate (int):  Position on the x-axis.
+        x_coordinate (int): Position on the x-axis.
         y_coordinate (int): Position on the y-axis.
-        health (int):  Number of health points.
+        health (int): Number of health points.
 
     Methods:
         hit(): Decrement Alien health by one point.
@@ -21,5 +21,5 @@ class Alien:
     pass
 
 
-#TODO (Student):  Create the new_aliens_collection() function below to call your Alien class with a list of coordinates
+#TODO (Student): Create the new_aliens_collection() function below to call your Alien class with a list of coordinates