Hopefully fix the Clang sphinx doc build.

This was broken several days ago in 826905787ae4c8540bb8a2384fac59c606c7eaff.
diff --git a/clang/docs/OpenCLSupport.rst b/clang/docs/OpenCLSupport.rst
index 2a6b9a0..047c73f 100644
--- a/clang/docs/OpenCLSupport.rst
+++ b/clang/docs/OpenCLSupport.rst
@@ -2,12 +2,12 @@
 
   <style type="text/css">
     .none { background-color: #FFCCCC }
-    .partial { background-color: #FFFF99 }
+    .part { background-color: #FFFF99 }
     .good { background-color: #CCFF99 }
   </style>
 
 .. role:: none
-.. role:: partial
+.. role:: part
 .. role:: good
 
 .. contents::
@@ -327,7 +327,7 @@
 
 Bugzilla bugs for this functionality are typically prefixed
 with '[C++4OpenCL]' - click `here
-<https://bugs.llvm.org/buglist.cgi?component=OpenCL&list_id=204139&product=clang&query_format=advanced&resolution=---&sh    ort_desc=%5BC%2B%2B4OpenCL%5D&short_desc_type=allwordssubstr>`_
+<https://bugs.llvm.org/buglist.cgi?component=OpenCL&list_id=204139&product=clang&query_format=advanced&resolution=---&short_desc=%5BC%2B%2B4OpenCL%5D&short_desc_type=allwordssubstr>`__
 to view the full bug list.
 
 
@@ -344,7 +344,7 @@
 
 OpenCL C 3.0 language standard makes most OpenCL C 2.0 features optional. Optional
 functionality in OpenCL C 3.0 is indicated with the presence of feature-test macros
-(list of feature-test macros is `here <https://www.khronos.org/registry/OpenCL/specs/3.0-unified/html/OpenCL_C.html#features>`_).
+(list of feature-test macros is `here <https://www.khronos.org/registry/OpenCL/specs/3.0-unified/html/OpenCL_C.html#features>`__).
 Command-line flag :ref:`-cl-ext <opencl_cl_ext>` can be used to override features supported by a target.
 
 For cases when there is an associated extension for a specific feature (fp64 and 3d image writes)