DOC: fix formatting read_csv comment kwarg explanation
DOC: reorg whatsnew files to subfolder
Merge pull request #8606 from jorisvandenbossche/doc-whatsnew-reorg

DOC: reorg whatsnew files to subfolder
BUG: cut/qcut on Series with "retbins" (GH8589)
Merge pull request #8563 from jorisvandenbossche/docstring-read-csv

DOC: fix formatting read_csv comment kwarg explanation
Merge pull request #8622 from rosnfeld/issue_8589

BUG: cut/qcut on Series with "retbins" (GH8589)
Fix shape attribute for MultiIndex

Also added tests for other ndarray compat properties.