Strip <para> and <simpara> elements when printing the purpose of a

function into the synopsis (because it has no detailed documentation).


[SVN r20497]

tools/boostbook

@@ -1 +1 @@
-Subproject commit 4ab5ff9dd674b07f58480e0cedb24609aa46e057
+Subproject commit 5bbddee283528a647303cd8b9c46a89af19194bb