ReleaseNotes: missing char

llvm-svn: 279176
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 9944c88..06ad744 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -87,7 +87,7 @@
 
 clang-cl has a new flag, ``/imsvc <dir>``, for adding a directory to the system
 include search path (where warnings are disabled by default) without having to
-set ``%INCLUDE``.
+set ``%INCLUDE%``.
 
 C Language Changes in Clang
 ---------------------------