doc: show source file link on html pages
A shortcut to find the :ref:`labelname` value to link to an HTML page is
to view the source .rst file for that page.  This patch tweaks the
conf.py to do just that.
@@ -243,7 +243,7 @@ def setup(app):
html_show_sphinx = False
# If true, links to the reST sources are added to the pages.
-html_show_sourcelink = False
+html_show_sourcelink = True
# If not '', a 'Last updated on:' timestamp is inserted at every page
# bottom,
