Fix markdown code block.

README.rst

@@ -19,35 +19,35 @@ Install Django RQ Pulse::
 
 Add it to your `INSTALLED_APPS`:
 
-```python
-INSTALLED_APPS = (
-    ...
-    'django_rq_pulse.apps.DjangoRqPulseConfig',
-    ...
-)
-```
+.. code-block:: python
+
+    INSTALLED_APPS = (
+        ...
+        'django_rq_pulse.apps.DjangoRqPulseConfig',
+        ...
+    )
 
 Usage
 --------
 
-```python
-# Check that rqworkers are running.
-# If the actual number of workers is not equal the expected number of workers or
-# If there are items in the queue but the queue size is not changing notify admins by email.
-python manage.py rq_pulse_check
+.. code-block:: python
+
+    # Check that rqworkers are running.
+    # If the actual number of workers is not equal the expected number of workers or
+    # If there are items in the queue but the queue size is not changing notify admins by email.
+    python manage.py rq_pulse_check
 
-# The above command will run with default parameters where
-# --expected-num-workers=2
-# --seconds-to-sleep=5
-# --num-retries=5
-# --queue-name="default"
+    # The above command will run with default parameters where
+    # --expected-num-workers=2
+    # --seconds-to-sleep=5
+    # --num-retries=5
+    # --queue-name="default"
 
-# You can override these values by passing any or all the parameters to the command like so:
-python manage.py rq_pulse_check --expected-num-workers=3 --queue-name="high"
+    # You can override these values by passing any or all the parameters to the command like so:
+    python manage.py rq_pulse_check \-\-expected-num-workers=3 \-\-queue-name="high"
 
-# To get a list of the command parameters use the --help parameter.
-python manage.py rq_pulse_check --help
-```
+    # To get a list of the command parameters use the --help parameter.
+    python manage.py rq_pulse_check --help
     
 Running Tests
 -------------