m2r2: Markdown and reStructuredText Converter

M2R2 is a Python library designed to convert Markdown files, including embedded reStructuredText (RST) markups, into a valid RST format. It is a actively maintained fork of the original `m2r` library, specifically addressing compatibility issues with Sphinx 3+ and newer Python versions. M2R2 also functions as a Sphinx extension, enabling developers to write documentation in Markdown directly within Sphinx projects. The current version is 0.3.4, with a focused release cadence primarily for maintenance and compatibility updates.