Docs: fix file patterns formatting (#13764)

Co-authored-by: Florian Bruhin <[email protected]>

Author: slackline

doc/en/getting-started.rst

@@ -73,7 +73,7 @@ The ``[100%]`` refers to the overall progress of running all test cases. After i
 Run multiple tests
 ----------------------------------------------------------
 
-``pytest`` will run all files of the form test_*.py or \*_test.py in the current directory and its subdirectories. More generally, it follows :ref:`standard test discovery rules <test discovery>`.
+``pytest`` will run all files of the form ``test_*.py`` or ``*_test.py`` in the current directory and its subdirectories. More generally, it follows :ref:`standard test discovery rules <test discovery>`.
 
 
 Assert that a certain exception is raised