Fix spelling and grammar

docs/source/testing.rst

@@ -67,7 +67,7 @@ for each affected test individually::
     
 replacing `test_XXX.py` with the test you'd like to run. This
 will execute the notebook, create artefact entries in the artefact
-dir, and the check for consistency by executing the test against
+dir, and after that will check for consistency by executing the test against
 these artefacts. This last part is important: the test should not
 fail on its own input. If it does, something is very likely wrong!
 
@@ -82,8 +82,8 @@ changed.
 
 .. note::
 
-    Reviewers should always question if a change in test artefacts
-    is appropriate and intended.
+    Reviewers should always evaluate if the changes in test artefacts are 
+    appropriate, intended and acceptable.
     
 Test Reports
 ++++++++++++
@@ -94,7 +94,7 @@ directory.
 
 .. note::
 
-    Please make sure to not commit any additional files into the
+    Please make sure not to commit any additional files into the
     `test_rsts subfolder` of this documentation. Also, do not commit
     `test_results.rst`. It is autogenerated.