src/doc/en/installation: Recommend to not use Sage older than 9.5; recommend Arch, Void downstream packages

Author: Matthias Koeppe

src/doc/en/installation/index.rst

@@ -115,7 +115,7 @@ Linux
       If you are on an older version of your distribution and a recent
       version of SageMath is only available on a newer version of the
       distribution, consider upgrading your distribution.
-      In particular, do not install a version of Sage older than 9.2.
+      In particular, do not install a version of Sage older than 9.5.
 
     - **No root access, or on an older distribution:** Install SageMath from
       the `conda-forge <https://conda-forge.org/>`_ project, as described in section

src/doc/en/installation/linux.rst

@@ -6,20 +6,24 @@ Linux Package Managers
 SageMath is available from various distributions and can be installed
 by package managers.
 
-See `the _sagemath dummy package <../reference/spkg/_sagemath.html>`_
-for the names of packages that provide a standard installation of
-SageMath, including documentation and Jupyter.
+As of Sage 10.2, we can recommend the following distributions, which
+provide well-maintained and up-to-date SageMath packages:
+`Arch Linux <https://archlinux.org/>`_
+and `Void Linux <https://voidlinux.org/>`_.
 
-See also `repology.org: sagemath
-<https://repology.org/project/sagemath/versions>`_ for information
-about versions of SageMath packages in various distributions.
-**Do not install a version of Sage older than 9.2.**
+Gentoo users might want to give a try to
+`sage-on-gentoo <https://github.com/cschwan/sage-on-gentoo>`_.
+
+**Do not install a version of Sage older than 9.5.**
 If you are on an older version of your distribution and a recent
 version of SageMath is only available on a newer version of the
 distribution, consider upgrading your distribution.
 
-Gentoo users might want to give a try to
-`sage-on-gentoo <https://github.com/cschwan/sage-on-gentoo>`_.
+See `the _sagemath dummy package <../reference/spkg/_sagemath.html>`_
+for the names of packages that provide a standard installation of
+SageMath, including documentation and Jupyter.  See also `repology.org: sagemath
+<https://repology.org/project/sagemath/versions>`_ for information
+about versions of SageMath packages in various distributions.
 
-The  `GitHub wiki page Distribution <https://github.com/sagemath/sage/wiki/Distribution>` collects information
+The  `GitHub wiki page Distribution <https://github.com/sagemath/sage/wiki/Distribution>`_ collects information
 regarding packaging and distribution of SageMath.