Documentation cleanup: fix a typo ("////" for "///") and suppress Doxygen's
automatic link generation for "file:", as it's not used as a URL here.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@175390 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation: use \brief and don't duplicate the name of the declared entity
at the start of the doc comment.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@175391 91177308-0d34-0410-b5e6-96231b3b80d8