Rename fixture uses to push request context

During tests execution request context has been pushed (not application
context!), so name it appropriately. Update documentation as well.

Author: vitalk

docs/features.rst

@@ -84,7 +84,7 @@ An instance of ``app.test_client``. Typically refers to
 
 .. hint::
 
-    During tests execution the application has pushed context, e.g.
+    During tests execution the request context has been pushed, e.g.
     ``url_for``, ``session`` and other context bound objects are available
     without context managers.
 

pytest_flask/plugin.py

@@ -64,8 +64,8 @@ def test_json(client):
 
 
 @pytest.fixture(autouse=True)
-def _push_application_context(request):
-    """During tests execution application has pushed context, e.g. `url_for`,
+def _push_request_context(request):
+    """During tests execution request context has been pushed, e.g. `url_for`,
     `session`, etc. can be used in tests as is::
 
         def test_app(app, client):

setup.py

@@ -28,7 +28,7 @@
     def test_app(app):
       assert not app.debug, 'Ensure the app not in debug mode'
 
-During tests execution the application has pushed context, e.g. ``url_for``,
+During tests execution the request context has been pushed, e.g. ``url_for``,
 ``session`` and other context bound objects are available without context
 managers: