Merge pull request #2460 from HaraldKorneliussen/master

Fixes syntax issues in quickstart (#2448)

docs/userguide/quickstart.rst

@@ -63,7 +63,7 @@ Then, you need an installer, such as `pep517 <https://pypi.org/project/pep517/>`
 which you can obtain via ``pip install pep517``. After downloading it, invoke
 the installer::
 
-    python -m pep517.build
+    python -m pep517.build .
 
 You now have your distribution ready (e.g. a ``tar.gz`` file and a ``.whl``
 file in the ``dist`` directory), which you can upload to PyPI!