Documentation cleanup:
* Add \brief summaries;
* Escape # characters in Doxygen comments;
* Add \code...\endcode markup for code examples;
* Add \verbatim...\endverbatim markup for grammar productions.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158976 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed