Fixing an RST issue to silence a sphinx warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@238241 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ReleaseNotes.rst

@@ -48,10 +48,9 @@ Major New Features
 ------------------
 
 - Use of the ``__declspec`` language extension for declaration attributes now
-requires passing the -fms-extensions or -fborland compiler flag. This language
-extension is also enabled when compiling CUDA code, but its use should be
-viewed as an implementation detail that is subject to change.
-
+  requires passing the -fms-extensions or -fborland compiler flag. This language
+  extension is also enabled when compiling CUDA code, but its use should be
+  viewed as an implementation detail that is subject to change.
 
 Improvements to Clang's diagnostics
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^