Fixup test for TimeWithZone Time.at precision
Fixup test for TimeWithZone Time.at precision

This test doesn't involve a DateTime, and can be shortened a bit.

betesh/rails,esparta/rails,kmcphillips/rails,kddeisz/rails,joonyou/rails,vipulnsward/rails,lcreid/rails,kmcphillips/rails,bogdanvlviv/rails,tjschuck/rails,georgeclaghorn/rails,kmcphillips/rails,yahonda/rails,Stellenticket/rails,yahonda/rails,tgxworld/rails,georgeclaghorn/rails,joonyou/rails,Envek/rails,bogdanvlviv/rails,esparta/rails,rails/rails,yahonda/rails,Vasfed/rails,eileencodes/rails,lcreid/rails,Erol/rails,esparta/rails,eileencodes/rails,bogdanvlviv/rails,Envek/rails,MSP-Greg/rails,EmmaB/rails-1,eileencodes/rails,kddeisz/rails,BlakeWilliams/rails,betesh/rails,tjschuck/rails,Edouard-chin/rails,yawboakye/rails,Stellenticket/rails,Edouard-chin/rails,vipulnsward/rails,EmmaB/rails-1,kddeisz/rails,Erol/rails,MSP-Greg/rails,tjschuck/rails,rails/rails,MSP-Greg/rails,yawboakye/rails,Vasfed/rails,Vasfed/rails,Erol/rails,vipulnsward/rails,yahonda/rails,Edouard-chin/rails,Edouard-chin/rails,esparta/rails,kmcphillips/rails,georgeclaghorn/rails,rails/rails,lcreid/rails,EmmaB/rails-1,tjschuck/rails,joonyou/rails,tgxworld/rails,Stellenticket/rails,Erol/rails,betesh/rails,BlakeWilliams/rails,kddeisz/rails,joonyou/rails,vipulnsward/rails,georgeclaghorn/rails,Stellenticket/rails,yawboakye/rails,Vasfed/rails,tgxworld/rails,Envek/rails,tgxworld/rails,eileencodes/rails,BlakeWilliams/rails,rails/rails,yawboakye/rails,lcreid/rails,MSP-Greg/rails,BlakeWilliams/rails,Envek/rails,betesh/rails,bogdanvlviv/rails