Silencing a Sphinx diagnostic with options, again.

Warning, treated as error:
/opt/llvm/build.attributes.src/tools/clang/docs/CommandGuide/clang.rst:413: WARNING: unknown option: -save-stats=cwd


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@282484 91177308-0d34-0410-b5e6-96231b3b80d8

docs/CommandGuide/clang.rst

@@ -411,8 +411,8 @@ Driver Options
 .. option:: -save-stats, -save-stats=cwd, -save-stats=obj
 
   Save internal code generation (LLVM) statistics to a file in the current
-  directory (:option:`-save-stats`/:option:`-save-stats=cwd`) or the directory
-  of the output file (:option:`-save-state=obj`).
+  directory (:option:`-save-stats`/"-save-stats=cwd") or the directory
+  of the output file ("-save-state=obj").
 
 .. option:: -integrated-as, -no-integrated-as