Remove trailing whitespace in test suite. Approved by Marshall Clow.

llvm-svn: 271435
diff --git a/libcxx/test/std/experimental/optional/optional.nullops/greater.pass.cpp b/libcxx/test/std/experimental/optional/optional.nullops/greater.pass.cpp
index f26e8f8..15b2200 100644
--- a/libcxx/test/std/experimental/optional/optional.nullops/greater.pass.cpp
+++ b/libcxx/test/std/experimental/optional/optional.nullops/greater.pass.cpp
@@ -24,7 +24,7 @@
     {
     typedef int T;
     typedef optional<T> O;
-    
+
     constexpr O o1;     // disengaged
     constexpr O o2{1};  // engaged