Fix code formatting.

Author: Alexandr-Konovalov

sycl/include/sycl/detail/cg_types.hpp

@@ -261,7 +261,7 @@ class HostKernelRef : public HostKernelRefBase {
 #ifndef __INTEL_PREVIEW_BREAKING_CHANGES
   // This function can't be called from old user code, because there is no
   // HostKernelRef in old user code. So, make it empty.
-  void InstantiateKernelOnHost() override { }
+  void InstantiateKernelOnHost() override {}
 #endif
 };