[-Wunsafe-buffer-usage] Unbreak clang-format on UnsafeBufferUsage.cpp. NFC.

Author: haoNoQ

clang/lib/Analysis/UnsafeBufferUsage.cpp

@@ -210,7 +210,7 @@ static auto isInUnspecifiedLvalueContext(internal::Matcher<Expr> innerMatcher) {
         hasLHS(innerMatcher)
       )
     ));
-// clang-format off
+// clang-format on
 }