yast/yast-- — comment on commit a9cdc77d163174ddda7b0546367df9d6be63af75
File: yast++lib-country/lib/y_lib/timezone.rb line 64
By jreidinger:

usually test for nil? is unnecessary. Only use case is if you have tristate logic - true,false and nil...otherwise simple
return nil unless sysconfig_timezone
is enough and commonly used in ruby world