docs: fix HTML word wapping in table cells

The sphinx_rtd_theme does not properly handle wrapping long lines in
table cells when rendering to HTML due to a CSS issue (see
readthedocs/sphinx_rtd_theme#1505).

Until the issue is fixed upstream in sphinx_rtd_theme, we can simply
override the CSS here.  This commit overrides the CSS in conf.py and
also touches up some places where we previously tried to work around
the lack of word wrapping.

Signed-off-by: Jeff Squyres <jeff@squyres.com>
(cherry picked from commit 9b3bdf8)

docs/conf.py

@@ -195,3 +195,16 @@
 .. |flex_min_version| replace:: {flex_min_version}
 
 """
+
+# The sphinx_rtd_theme does not properly handle wrapping long lines in
+# table cells when rendering to HTML due to a CSS issue (see
+# https://github.com/readthedocs/sphinx_rtd_theme/issues/1505).  Until
+# the issue is fixed upstream in sphinx_rtd_theme, we can simply
+# override the CSS here.
+rst_prolog += """
+.. raw:: html
+
+   <style>
+   .wy-table-responsive table td,.wy-table-responsive table th{white-space:normal}
+   </style>
+"""

docs/installing-pmix/required-support-libraries.rst

@@ -14,13 +14,13 @@ PMIx requires the following support libraries with the minimum listed versions:
      - Notes
    * - `Hardware Locality <https://www.open-mpi.org/projects/hwloc/>`_
      - |hwloc_min_version|
-     - | This library is required; PMIx will not build without it.
+     - This library is required; PMIx will not build without it.
    * - `Libevent <https://libevent.org/>`_
      - |event_min_version|
-     - | Either libevent or libev must be provided
+     - Either libevent or libev must be provided
    * - `libev <https://metacpan.org/dist/EV/view/libev/ev.pod>`_
-     - | no specified minimum
-     - | Either libevent or libev must be provided
+     - no specified minimum
+     - Either libevent or libev must be provided
 
 These support libraries are fundamental to PMIx's operation
 and pretty universally available in all environments. Worst case,