Documentation: random cleanups.  Use monospaced font where appropriate,
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
diff --git a/docs/InternalsManual.rst b/docs/InternalsManual.rst
index ccd3ae3..bbfcc54 100644
--- a/docs/InternalsManual.rst
+++ b/docs/InternalsManual.rst
@@ -73,8 +73,8 @@
 pieces, this section describes them and talks about best practices when adding
 a new diagnostic.
 
-The Diagnostic*Kinds.td files
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The ``Diagnostic*Kinds.td`` files
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Diagnostics are created by adding an entry to one of the
 ``clang/Basic/Diagnostic*Kinds.td`` files, depending on what library will be