Recommend the tox-venv plug-in

In the coder guide, include a suggestion for tox-venv (a tox plug-in
which makes tox use the venv module from the Python 3 standard
library in place of the separate virtualenv package).

diff --git a/doc/source/coder.rst b/doc/source/coder.rst
index 32d154f..25493b0 100644 (file)
--- a/doc/source/coder.rst
+++ b/doc/source/coder.rst
@@ -43,9 +43,11 @@ Basic developer requirements are a POSIX Unix derivative (such as
 Linux), a modern Python 3 interpreter (any of the minor revisions
 mentioned in the ``metadata.classifier`` section of
 :file:`setup.cfg`) and a recent release of the tox_ utility (at least
-the ``tox.minversion`` mentioned in :file:`tox.ini`).
+the ``tox.minversion`` mentioned in :file:`tox.ini`). The tox-venv_
+plug-in for tox is also recommended.
 
 .. _tox: https://tox.readthedocs.io/
+.. _tox-venv: https://pypi.org/project/tox-venv/
 
 application program interface
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~