suppress pytest rewrite assertion warning (#1279)

Hi,

can you please consider patch to suppress the pytest rewrite assertion
warning when running `basilisp test`. It fixes #1252.

I haven’t added a test, as it would require creating a virtual
environment during testing, which seemed excessive for this issue.
However, I’m happy to add one if you feel it’s necessary.

Thanks

Note: this is a follow up to #1255 but it uses the `;` separator to
specify the module name, introduced by
pytest-dev/pytest#13429 in [Pytest
8.4.0](https://docs.pytest.org/en/stable/changelog.html#pytest-8-4-0-2025-06-02).

---------

Co-authored-by: ikappaki <[email protected]>

Author: ikappaki

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
  * Fix a bug where `import` refers would incorrectly be applied to all import modules in the same form (#1274)
+ * Suppress pytest assertion rewrite warning for basilisp when running `basilisp test` (#1252)
 
 ### Removed
  * Removed support for Python 3.9 (#1283)

src/basilisp/cli.py

@@ -745,6 +745,16 @@ def test(
             "Cannot run tests without dependency PyTest. Please install PyTest and try again.",
         )
     else:
+        # `basilisp` declares the testrunner as a pytest plugin, so
+        # pytest tries to import it for assertion rewriting.  Since
+        # it's already imported, pytest emits a warning. As rewriting
+        # isn't needed, we ignore it. (Requires pytest >=8.4.0 to take
+        # effect)
+        extra = [
+            "-W",
+            "ignore:Module already imported so cannot be rewritten; basilisp:pytest.PytestAssertRewriteWarning",
+        ] + extra
+
         sys.exit(pytest.main(args=list(extra)))