[docs] Use vim code-block instead of console.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176418 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ClangFormat.rst b/docs/ClangFormat.rst
index 9475358..f5c0b4c 100644
--- a/docs/ClangFormat.rst
+++ b/docs/ClangFormat.rst
@@ -49,7 +49,7 @@
 
 This can be integrated by adding the following to your `.vimrc`:
 
-.. code-block:: console
+.. code-block:: vim
 
   map <C-I> :pyf <path-to-this-file>/clang-format.py<CR>
   imap <C-I> <ESC>:pyf <path-to-this-file>/clang-format.py<CR>i