Documentation cleanup:
* Escaped "::" where needed to prevent Doxygen trying to make links;
* Updated one mention of C++0x to refer to C++11;
* Fixed a \brief summary to make it somewhat concise.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158667 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed