Fix all the rest of the \ separators to / in mmp files.
#ifndef Py_PGEN_H
#define Py_PGEN_H
#ifdef __cplusplus
extern "C" {
#endif
/* Parser generator interface */
extern grammar *meta_grammar(void);
struct _node;
extern grammar *pgen(struct _node *);
#ifdef __cplusplus
}
#endif
#endif /* !Py_PGEN_H */