Global and Return edits (#232)

* replaced "&" with "and" in article heading

* fixed minor typos

Author: Abidi-S

global_&_return.rst

@@ -1,9 +1,9 @@
-Global & Return
+Global and Return
 ---------------
 
-You might have encountered some functions written in python which have a
+You might have encountered some functions written in Python which have a
 ``return`` keyword in the end of the function. Do you know what it does? It
-is similar to return in other languages. Lets examine this little
+is similar to return in other languages. Let's examine this little
 function:
 
 .. code:: python
@@ -15,7 +15,7 @@ function:
     print(result)
     # Output: 8
 
-The function above takes two values as input and then output their
+The function above takes two values as input and then outputs their
 addition. We could have also done:
 
 .. code:: python
@@ -28,11 +28,11 @@ addition. We could have also done:
     print(result)
     # Output: 8
 
-So first lets talk about the first bit of code which involves the
+So first let's talk about the first bit of code which involves the
 ``return`` keyword. What that function is doing is that it is assigning
 the value to the variable which is calling that function which in our
-case is ``result``. In most cases and you won't need to use the
-``global`` keyword. However lets examine the other bit of code as well
+case is ``result``. In most cases you won't need to use the
+``global`` keyword. However, let's examine the other bit of code as well
 which includes the ``global`` keyword. So what that function is doing is
 that it is making a global variable ``result``. What does global mean
 here? Global variable means that we can access that variable outside the
@@ -125,11 +125,11 @@ Or by more common convention:
     print(profile_age)
     # Output: 30
 
-Keep in mind that even in the above example we are returning a tuple (despite the lack of paranthesis) and not separate multiple values. If you want to take it one step further, you can also make use of `namedtuple <https://docs.python.org/3/library/collections.html#collections.namedtuple>`_. Here is an example:
+Keep in mind that even in the above example we are returning a tuple (despite the lack of parenthesis) and not separate multiple values. If you want to take it one step further, you can also make use of `namedtuple <https://docs.python.org/3/library/collections.html#collections.namedtuple>`_. Here is an example:
 
 .. code:: python
 
-    from collections import namedtuple                                                                                     
+    from collections import namedtuple
     def profile():
         Person = namedtuple('Person', 'name age')
         return Person(name="Danny", age=31)
@@ -157,4 +157,4 @@ Keep in mind that even in the above example we are returning a tuple (despite th
     print(age)
     #31
 
-This is a better way to do it along with returning ``lists`` and ``dicts``. Don't use ``global`` keyword unless you know what you are doing. ``global`` might be a better option in a few cases but is not in most of them.
+This is a better way to do it, along with returning ``list`` and ``dict``. Don't use ``global`` keyword unless you know what you are doing. ``global`` might be a better option in a few cases but is not in most of them.