code cleanup: rubocop: fix Style/WhileUntilModifier in lib/redmine/utils.rb

git-svn-id: http://svn.redmine.org/redmine/trunk@18760 e93f8b46-1217-0410-a6f0-8f06a7374b81

.rubocop_todo.yml

 Style/WhileUntilModifier:
   Exclude:
     - 'app/models/attachment.rb'
-    - 'lib/redmine/utils.rb'
 
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, MinSize, WordRegex.

lib/redmine/utils.rb

       def next_working_date(date)
         cwday = date.cwday
         days = 0
-        while non_working_week_days.include?(((cwday + days - 1) % 7) + 1)
-          days += 1
-        end
+        days += 1 while non_working_week_days.include?(((cwday + days - 1) % 7) + 1)
         date + days
       end