Change pipeline testrunner to xmlrunner

I have change the testrunner from `unittest` to `xmlrunner` in the
Azure pipeline to be able to publish our test results on Azure. This
is the same runner as `site` uses to generate XML reports.

In addition, I've cleaned up some small mistakes in docstrings and
`README.md`.

1 files changed, 1 insertions, 0 deletions

diff --git a/Pipfile b/Pipfile
index 0c73e4ca2..48d839fc3 100644
--- a/Pipfile
+++ b/Pipfile
@@ -32,6 +32,7 @@ flake8-tidy-imports = "~=2.0"
 flake8-todo = "~=0.7"
 pre-commit = "~=1.18"
 safety = "~=1.8"
+unittest-xml-reporting = "~=2.5"
 dodgy = "~=0.1"
 
 [requires]