Grok messaging machinery

For details see doctests.

Name		Name	Last commit message	Last commit date
Latest commit History 73 Commits
.github/workflows		.github/workflows
src/grokcore		src/grokcore
.editorconfig		.editorconfig
.gitignore		.gitignore
.meta.toml		.meta.toml
.pre-commit-config.yaml		.pre-commit-config.yaml
CHANGES.rst		CHANGES.rst
CONTRIBUTING.md		CONTRIBUTING.md
COPYRIGHT.txt		COPYRIGHT.txt
LICENSE.txt		LICENSE.txt
MANIFEST.in		MANIFEST.in
README.rst		README.rst
buildout.cfg		buildout.cfg
pyproject.toml		pyproject.toml
setup.cfg		setup.cfg
setup.py		setup.py
tox.ini		tox.ini

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