Fix some clang-tidy namespace closing comments warnings. NFC.
diff --git a/llvm/lib/IR/FPEnv.cpp b/llvm/lib/IR/FPEnv.cpp
index 910ec98..516c702 100644
--- a/llvm/lib/IR/FPEnv.cpp
+++ b/llvm/lib/IR/FPEnv.cpp
@@ -80,4 +80,4 @@
   }
   return ExceptStr;
 }
-}
+} // namespace llvm