Fix: Edits from @Midnighter

Co-authored-by: Moritz E. Beber <midnighter@posteo.net>

Author: lwasser

tests/run-tests.md

@@ -145,11 +145,11 @@ import nox
 @nox.session(python=["3.9", "3.10", "3.11", "3.12"])
 def test(session):
 
-# install
-session.install(".[tests]")
+    # install
+    session.install(".[tests]")
 
-# Run tests
-session.run("pytest")
+    # Run tests
+    session.run("pytest")
 
 ```