2.7.2 :006 > s = "Type: MHT 860L, year 2010, 7436 hours, 4x4x4, extra pipes, tyres 445/65 R 22,5, q/c with bucket and forks\n2020"
 => "Type: MHT 860L, year 2010, 7436 hours, 4x4x4, extra pipes, tyres 445/65 R 22,5, q/c with bucket and forks\n2020"
2.7.2 :007 > puts s
Type: MHT 860L, year 2010, 7436 hours, 4x4x4, extra pipes, tyres 445/65 R 22,5, q/c with bucket and forks
2020
 => nil
2.7.2 :008 > s.sub /\d+\z/, ''
 => "Type: MHT 860L, year 2010, 7436 hours, 4x4x4, extra pipes, tyres 445/65 R 22,5, q/c with bucket and forks\n"