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

GitOrigin-RevId: 4cd6ca102a94e1b64ba3f940cc26b4d7b2b82964
diff --git a/include/complex.h b/include/complex.h
index b78733b..cdf97ac 100644
--- a/include/complex.h
+++ b/include/complex.h
@@ -31,6 +31,6 @@
 
 #include_next <complex.h>
 
-#endif  // __cplusplus
+#endif // __cplusplus
 
-#endif  // _LIBCPP_COMPLEX_H
+#endif // _LIBCPP_COMPLEX_H