Function is_M29

Marlin/src/gcode/queue.cpp:329–332

}

FORCE_INLINE bool is_M29(const char * const cmd) {  // matches "M29" & "M29 ", but not "M290", etc
  const char * const m29 = strstr_P(cmd, PSTR("M29"));
  return m29 && !NUMERIC(m29[3]);
}

#define PS_NORMAL 0
#define PS_EOL    1