Tweaked appearance of member classes/structs/unions in a class synopsis

so they don't run together with previous typedefs or static constants, but
are separated by a blank line and comment.



[SVN r53549]

tools/boostbook

@@ -1 +1 @@
-Subproject commit 5c4733f5fc65b110329307d2cbf38d3bfb4f3b04
+Subproject commit 006f34db466e456a2850354e77005ed461673c4c