Revert an accidental whitespace change

Author: godlygeek

Include/internal/pycore_interp_structs.h

@@ -936,6 +936,7 @@ struct _is {
     _PyThreadStateImpl _initial_thread;
     // _initial_thread should be the last field of PyInterpreterState.
     // See https://github.com/python/cpython/issues/127117.
+
 #if !defined(Py_GIL_DISABLED) && defined(Py_STACKREF_DEBUG)
     uint64_t next_stackref;
     _Py_hashtable_t *open_stackrefs_table;