add missing space which prevented the llvm.loop code-block from appearing in the
generated html.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175769 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.rst b/docs/LangRef.rst
index c3b776e..cf9a8c0 100644
--- a/docs/LangRef.rst
+++ b/docs/LangRef.rst
@@ -2535,6 +2535,7 @@
 itself as follows:
 
 .. code-block:: llvm
+
     !0 = metadata !{ metadata !0 }
 
 '``llvm.loop.parallel``' Metadata