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

GitOrigin-RevId: 4cd6ca102a94e1b64ba3f940cc26b4d7b2b82964
diff --git a/include/cfloat b/include/cfloat
index da22c6f..77ff526 100644
--- a/include/cfloat
+++ b/include/cfloat
@@ -76,4 +76,4 @@
 #pragma GCC system_header
 #endif
 
-#endif  // _LIBCPP_CFLOAT
+#endif // _LIBCPP_CFLOAT