some more markup in changelog

CHANGES

@@ -10,12 +10,12 @@ Bugs fixed
 
 * #1337: Fix autodoc with ``autoclass_content="both"`` uses useless
   ``object.__init__`` docstring when class does not have ``__init__``.
-  This caused by a change for #1138.
+  This was caused by a change for #1138.
 
 * #1340: Can't search alphabetical words on the HTML quick search generated
   with language='ja'.
 
-* #1319: Do not crash if the ``html_logo`` file does not exist.
+* #1319: Do not crash if the :confval:`html_logo` file does not exist.
 
 * #603: Do not use the HTML-ized title for building the search index (that
   resulted in "literal" being found on every page with a literal in the
@@ -30,8 +30,8 @@ Bugs fixed
 
 * #932: autodoc: Do not crash if ``__doc__`` is not a string.
 
-* #933: Do not crash if an ``:option:`` value is malformed (contains spaces
-  but no option name).
+* #933: Do not crash if an :rst:role:`option` value is malformed (contains
+  spaces but no option name).
 
 * #908: On Python 3, handle error messages from LaTeX correctly in the pngmath
   extension.
@@ -41,7 +41,7 @@ Bugs fixed
 
 * #923: Take the entire LaTeX document into account when caching
   pngmath-generated images.  This rebuilds them correctly when
-  ``pngmath_latex_preamble`` changes.
+  :confval:`pngmath_latex_preamble` changes.
 
 * #901: Emit a warning when using docutils' new "math" markup without a Sphinx
   math extension active.
@@ -54,7 +54,7 @@ Bugs fixed
 * #949: Update the tabulary.sty packed with Sphinx.
 
 * #1050: Add anonymous labels into ``objects.inv`` to be referenced via
-  intersphinx.
+  :mod:`~sphinx.ext.intersphinx`.
 
 * #1095: Fix print-media stylesheet being included always in the "scrolls"
   theme.