anchor.diff:  
   *-t* text:: Program NFC NDEF text
   
  -=== YubiKey 3.0 and above
  +=== YubiKey 3 and 4 only
   
   *-m* mode::
   
  
positive.code: +
  Note that you must remove any whitespace present in these examples before using the values.
  
  
  === YubiKey 2.3 and above
  
  
negative.code: the YubiKey, further mode changes will have to be done with ykneomgr (for CCID mode) 
  or u2f-host (for U2F mode)
  
  === YubiKey 3 and above
  
  *-S*'0605...'::
  
  set the scanmap to be used with the YubiKey. It must be 45 unique
  