Link to newsletter in README, doc/index

- Copyedit some typos.
- Reflow text.

README.md

@@ -20,11 +20,11 @@ The `message_ix` Python package—also fully usable from R—includes:
 - Application programming interfaces (APIs) and tools for model building and scientific programming,
 - Extensive documentation and a complete test suite.
 
-The framework is built on IIASA's [*ix* modeling platform (`ixmp`)](https://github.com/iiasa/ixmp), which provides data warehouse features for high-powered numerical scenario analysis.
+The framework is built on IIASA's [*ix* modeling platform (`ixmp`)](https://github.com/iiasa/ixmp), which provides data warehouse features for numerical scenario analysis.
 
 ## Documentation
 
-Complete documentation of the framework is avaiable at **https://docs.messageix.org/**.
+Complete documentation of the framework is available at **https://docs.messageix.org**.
 This includes:
 
 - **Installation** and recommended pre-requisite learning.
@@ -39,19 +39,27 @@ This includes:
 Other forms of documentation:
 
 - The online documentation is built automatically from the contents of the
-[`message_ix` GitHub repository](https://github.com/iiasa/messag_ix).
+[`message_ix` GitHub repository](https://github.com/iiasa/message_ix).
 - Documentation for the ‘latest’ or ‘stable’ release is shown by default.
 - Use the chooser to access the [‘latest’ version](https://docs.messageix.org/en/latest/), corresponding to the ``main`` branch and including the latest development code; or to access docs for a specific release, e.g. `v3.2.0`.
 - For offline use, the documentation can be built from the source code.
   See the file [`doc/README.rst`](doc/README.rst)
 
 ## Commitment to our Community
 
-- We aim to create a community that is welcoming to everyone. Please respect our [Code of Conduct](CODE_OF_CONDUCT.md) at all times when interacting with `message_ix` and the community.
+- We aim to create a community that is welcoming to everyone.
+  Please respect our [Code of Conduct](CODE_OF_CONDUCT.md) at all times when interacting with `message_ix` and the community.
 - We warmly welcome all contributions to our community. Please take a look at our [guidelines for contributing to development](https://docs.messageix.org/en/latest/contributing.html).
 - If you are looking to understand how the `message_ix` team operates and how we decide what to do with your contributions, please read our [governance guidelines](GOVERNANCE.md).
-- We highly value code security. To learn more about our security practice and advice, please visit our [security policy](.github/SECURITY.md).
-- We strive to entertain a welcoming and inclusive community. If you struggle to use `message_ix`, please check our [guidelines for getting support](SUPPORT.md).
+- We highly value code security.
+  To learn more about our security practice and advice, please visit our [security policy](.github/SECURITY.md).
+- We strive to entertain a welcoming and inclusive community.
+  If you struggle to use `message_ix`, please check our [guidelines for getting support](SUPPORT.md).
+- We also:
+  - Host an annual [MESSAGEix Community Meeting](https://iiasa.ac.at/search?search_api_fulltext=MESSAGEix+Community+Meeting).
+  - Publish, at least once per year, a community newsletter.
+    You are cordially invited to subscribe by filling [this form](https://iiasa.ac.at/signup) and ticking the box for “MESSAGEix Community”.
+
 
 ## License
 

doc/index.rst

@@ -143,15 +143,20 @@ Everyone is required to please follow our Code of Conduct, which you can find `o
 
 .. _help:
 
-Have a question? Check…
 
-- …on GitHub:
+For further information and to get involved with the MESSAGEix user/developer community:
 
-  - Join an existing `discussion <https://github.com/iiasa/message_ix/discussions>`_ or start a new one with your question.
+- Check on GitHub:
+
+  - Join an existing `discussion <https://github.com/iiasa/message_ix/discussions>`_ or start a new one with your MESSAGEix usage question.
   - Search `current issues <https://github.com/iiasa/message_ix/issues?q=is:issue>`_, or open a new one to report a bug in the code.
 
-- …the :doc:`faq`.
-- …the message_ix Google Group, either `online <https://groups.google.com/d/forum/message_ix>`_ or via e-mail at <[email protected]>.
+- See the less frequently updated :doc:`faq` and message_ix Google Group, either `online <https://groups.google.com/d/forum/message_ix>`_ or via e-mail at <[email protected]>.
+
+.. _newsletter:
+
+- We cordially invite you to subscribe to the **MESSAGEix Community Newsletter** by filling `this form <https://iiasa.ac.at/signup>`__ and ticking the box for "MESSAGEix-Community".
+  At least once a year, we update all subscribers on the latest research and ongoing projects regarding MESSAGEix and invite you to our annual `Community Meeting <https://iiasa.ac.at/search?search_api_fulltext=MESSAGEix+Community+Meeting`__.
 
 .. _`MESSAGEix-GLOBIOM documentation`: http://data.ene.iiasa.ac.at/message-globiom/
 .. _`APACHE 2.0 open-source license`: https://github.com/iiasa/message_ix/blob/main/LICENSE