doc: Adding the missing sys import (#8819) (#8827)

Srip · sripradha-karkala-nutanix · web-flow · commit 9cdb7223b5f4 · 2021-06-30T08:11:20.000+02:00
Co-authored-by: Sripradha Karkala &lt;sripradha.karkala@nutanix.com&gt;
diff --git a/doc/en/how-to/usage.rst b/doc/en/how-to/usage.rst
@@ -184,6 +184,7 @@ You can specify additional plugins to ``pytest.main``:
 
     # content of myinvoke.py
     import pytest
+    import sys
 
 
     class MyPlugin:
