Fix typo, add rST code block
MODIFY
docs/contributing.rst
docs/contributing.rst
@@ -49,7 +49,7 @@ you::
nox > Session test-3.7 was successful.
There is also a nox command for running all of our tests and multiple python
-versions.
+versions.::
$ nox --reuse-existing-virtualenvs --sessions test
@@ -89,7 +89,7 @@ To specify an exact test case the following syntax also works:
(eg.: ``test/with_dummyserver/test_https.py::TestHTTPS::test_simple``).
The following argument is another valid example to pass to pytest: ``-k test_methode_name``.
These are useful when developing new test cases and there is no point
-re-running ther entire test suite every iteration. It is also possible to
+re-running the entire test suite every iteration. It is also possible to
further parameterize pytest for local testing.
For all valid arguments, check `the pytest documentation

Fix typo, add rST code block