Fix failure in reporter_test.rb
Fix failure in reporter_test.rb

I'm not sure about this one. The gist is, minitest's
UnexpectedError#message includes a backtrace but the reporter tests
here expect there not to be one in inline output.

Personally, I think that's wrong as it removes information you'd want
to debug, but this might be a philosophical difference with the rails
test ethos... or it might just be aesthetic.

I am happy to back out this change and fix the tests if you'd rather.

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