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

GitOrigin-RevId: 4cd6ca102a94e1b64ba3f940cc26b4d7b2b82964
diff --git a/include/iosfwd b/include/iosfwd
index f60437c..7b44d6e 100644
--- a/include/iosfwd
+++ b/include/iosfwd
@@ -227,7 +227,7 @@
 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
 typedef fpos<mbstate_t>    u16streampos;
 typedef fpos<mbstate_t>    u32streampos;
-#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
+#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
 
 #if defined(_NEWLIB_VERSION)
 // On newlib, off_t is 'long int'
@@ -279,4 +279,4 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif  // _LIBCPP_IOSFWD
+#endif // _LIBCPP_IOSFWD