Improve README: fix examples and typos

Author: blueyed

README.rst

@@ -130,7 +130,7 @@ Example: How do I use it with Django?
 Given that I have a ``.env`` file at my repository root directory, here is a snippet of my ``settings.py``.
 
 I also recommend using `unipath <https://pypi.python.org/pypi/Unipath>`_
-and `dj-datatabase-url <https://pypi.python.org/pypi/dj-database-url/>`_.
+and `dj-database-url <https://pypi.python.org/pypi/dj-database-url/>`_.
 
 .. code-block:: python
 
@@ -182,9 +182,10 @@ Overriding config files with environment variables
 
 Some times you may want to change a parameter value without having to edit the ``.ini`` or ``.env`` files.
 
-Since version 3.0, *decouple* respect the *unix way*. So environment variables have precedence over config files.
+Since version 3.0, *decouple* respect the *unix way*.
+Therefore environment variables have precedence over config files.
 
-To override a config parameter you can simply:
+To override a config parameter you can simply do:
 
 .. code-block:: console
 
@@ -258,7 +259,7 @@ Let's see some examples for the above mentioned cases:
 
     >>> os.environ['ALLOWED_HOSTS'] = '.localhost, .herokuapp.com'
     >>> config('ALLOWED_HOSTS', cast=lambda v: [s.strip() for s in v.split(',')])
-    ['.localhost,', '.herokuapp.com']
+    ['.localhost', '.herokuapp.com']
 
 As you can see, `cast` is very flexible. But the last example got a bit complex.
 
@@ -271,9 +272,10 @@ Let's improve the last example:
 
 .. code-block:: pycon
 
+    >>> from decouple import Csv
     >>> os.environ['ALLOWED_HOSTS'] = '.localhost, .herokuapp.com'
     >>> config('ALLOWED_HOSTS', cast=Csv())
-    ['.localhost,', '.herokuapp.com']
+    ['.localhost', '.herokuapp.com']
 
 You can also parametrize the *Csv Helper* to return other types of data.
 
@@ -285,9 +287,8 @@ You can also parametrize the *Csv Helper* to return other types of data.
 
     >>> os.environ['COMPLEX_STRING'] = '%virtual_env%\t *important stuff*\t   trailing spaces   '
     >>> csv = Csv(cast=lambda s: s.upper(), delimiter='\t', strip=' %*')
-    >>> csv('%virtual_env%\t *important stuff*\t   trailing spaces   ')
+    >>> csv(os.environ['COMPLEX_STRING'])
     ['VIRTUAL_ENV', 'IMPORTANT STUFF', 'TRAILING SPACES']
-    """
 
 License
 =======