Fix markdown code block.

README.rst

@@ -20,33 +20,33 @@ Install Django RQ Pulse::
 Add it to your `INSTALLED_APPS`:
 
 ```python
-    INSTALLED_APPS = (
-        ...
-        'django_rq_pulse.apps.DjangoRqPulseConfig',
-        ...
-    )
+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
-
-    # 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"
-
-    # To get a list of the command parameters use the --help parameter.
-    python manage.py rq_pulse_check --help
+# 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"
+
+# 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
 ```
 
 Running Tests