Simplify UserPaginator.page_range a bit
Simplify UserPaginator.page_range a bit

Since the minimal value of UserPaginator._current_page is
set in the constructor, we don't need max(..., 1).

python/pythondotorg,Mariatta/pythondotorg,proevo/pythondotorg,manhhomienbienthuy/pythondotorg,proevo/pythondotorg,manhhomienbienthuy/pythondotorg,manhhomienbienthuy/pythondotorg,proevo/pythondotorg,python/pythondotorg,manhhomienbienthuy/pythondotorg,python/pythondotorg,proevo/pythondotorg,Mariatta/pythondotorg,python/pythondotorg,Mariatta/pythondotorg,Mariatta/pythondotorg