v59.0.0

Deprecations

* #2856: Support for custom commands that inherit directly from ``distutils`` is

**deprecated**. Users should extend classes provided by setuptools instead.

Breaking Changes

* #2870: Started failing on invalid inline description with line breaks :class:`ValueError` -- by :user:`webknjaz`

Changes

* #2698: Exposed exception classes from ``distutils.errors`` via ``setuptools.errors``.

* #2866: Incorporate changes from pypa/distutils@f1b0a2b.

Documentation changes

* #2227: Added sphinx theme customisations to display the new logo in the sidebar and

use its colours as "accent" in the documentation -- by :user:`abravalheri`

* #2227: Added new setuptools logo, including editable files and artwork documentation

-- by :user:`abravalheri`

* #2698: Added mentions to ``setuptools.errors`` as a way of handling custom command

errors.

* #2698: Added instructions to migrate from ``distutils.commands`` and

``distutils.errors`` in the porting guide.

* #2871: Added a note to the docs that it is possible to install

``setup.py``-less projects in editable mode with :doc:`pip v21.1+

<pip:index>`, only having ``setup.cfg`` and ``pyproject.toml`` in

project root -- by :user:`webknjaz`