[libc++] NFC: Normalize `#endif //` comment indentation

GitOrigin-RevId: 4cd6ca102a94e1b64ba3f940cc26b4d7b2b82964
diff --git a/include/__string b/include/__string
index 350d0ca..a958277 100644
--- a/include/__string
+++ b/include/__string
@@ -889,7 +889,7 @@
     return __r;
 }
 
-#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
+#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
 
 // helper fns for basic_string and string_view
 
@@ -1134,4 +1134,4 @@
 
 _LIBCPP_POP_MACROS
 
-#endif  // _LIBCPP___STRING
+#endif // _LIBCPP___STRING