[[gnu::...]] syntax

Pointed out by Richard Smith on the mailing list.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172487 91177308-0d34-0410-b5e6-96231b3b80d8

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171382 91177308-0d34-0410-b5e6-96231b3b80d8

highlight console output with "code-block:: console", etc.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170276 91177308-0d34-0410-b5e6-96231b3b80d8

Patch by Anastasi Voitova with with small fixes by me.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170275 91177308-0d34-0410-b5e6-96231b3b80d8