review: fix formatting

Author: inbelic

llvm/test/CodeGen/DirectX/metadata-stripping.ll

@@ -24,7 +24,7 @@ _Z4mainDv3_j.exit:                                ; preds = %for.body.i, %entry
 ; These next check lines check that only the range metadata remains
 ; No more metadata should be necessary, the rest (the current 0 and 1)
 ; should be removed.
-; CHECK-NOT: {!"llvm.loop.mustprogress"}
+; CHECK-NOT: !{!"llvm.loop.mustprogress"}
 ; CHECK-DAG: [[RANGEMD]] = !{i32 1, i32 5}
 ; CHECK-DAG: [[LOOPMD]] = distinct !{[[LOOPMD]]}
 ; CHECK-NOT: {!"llvm.loop.mustprogress"}