Add a test and a changenote for RECORD in subdirs issue

CHANGELOG.md

@@ -22,6 +22,10 @@ Versioning](https://semver.org/spec/v2.0.0.html).
   `WHEEL` file is corrupted or wrong, the `.wheeldata` will be set to `None`,
   as opposed to `.metadata` as was the case previously. Thanks to
   [mboisson](https://github.com/mboisson) for spotting this and the fix.
+- Writing a `.dist-info/RECORD` file in a subdirectory of the archive will no
+  longer trigger an `AssertionError`. This should help with vendoring packages
+  inside wheels. Thanks to [mboisson](https://github.com/mboisson) for
+  providing a fix.
 
 ## [0.0.8] - 2021-08-03
 ### Changed

tests/test_wheels_with_vendoring.py

@@ -0,0 +1,10 @@
+import pytest
+
+
+def test_allows_writing_record_files_in_subdirectories(wf):
+    try:
+        wf.writestr("some/subdir/.dist-info/RECORD", "additional record file")
+    except Exception as exc:
+        pytest.fail(
+            f"Write failed, indicating inability to write RECORD in subdirs: {exc!r}"
+        )