Eliminate "warning: assigned but unused variable - testEof"
Eliminate "warning: assigned but unused variable - testEof"

https://github.com/ammar/regexp_parser/pull/57

```
% be ruby -w -Itest test/controller/filters_test.rb
/Users/kamipo/src/github.com/rails/rails/vendor/bundle/ruby/2.5.0/gems/addressable-2.5.2/lib/addressable/idna/pure.rb:154: warning: assigned but unused variable - startercc
/Users/kamipo/src/github.com/rails/rails/vendor/bundle/ruby/2.5.0/gems/regexp_parser-1.2.0/lib/regexp_parser/scanner.rb:1146: warning: assigned but unused variable - testEof
Run options: --seed 32647

# Running:

...................................................

Finished in 0.291176s, 175.1518 runs/s, 343.4349 assertions/s.
51 runs, 100 assertions, 0 failures, 0 errors, 0 skips
```

vipulnsward/rails,bogdanvlviv/rails,starknx/rails,EmmaB/rails-1,yahonda/rails,betesh/rails,esparta/rails,yawboakye/rails,jeremy/rails,iainbeeston/rails,yawboakye/rails,fabianoleittes/rails,Stellenticket/rails,tgxworld/rails,schuetzm/rails,gauravtiwari/rails,MSP-Greg/rails,joonyou/rails,kddeisz/rails,repinel/rails,betesh/rails,yalab/rails,jeremy/rails,eileencodes/rails,tjschuck/rails,Stellenticket/rails,prathamesh-sonpatki/rails,Erol/rails,Vasfed/rails,yhirano55/rails,joonyou/rails,Vasfed/rails,tgxworld/rails,tjschuck/rails,prathamesh-sonpatki/rails,bogdanvlviv/rails,yalab/rails,utilum/rails,iainbeeston/rails,yhirano55/rails,EmmaB/rails-1,arunagw/rails,palkan/rails,repinel/rails,arunagw/rails,utilum/rails,gauravtiwari/rails,prathamesh-sonpatki/rails,lcreid/rails,Envek/rails,tjschuck/rails,esparta/rails,flanger001/rails,Erol/rails,schuetzm/rails,notapatch/rails,yawboakye/rails,esparta/rails,shioyama/rails,utilum/rails,Vasfed/rails,bogdanvlviv/rails,notapatch/rails,rails/rails,eileencodes/rails,flanger001/rails,rafaelfranca/omg-rails,Edouard-chin/rails,kmcphillips/rails,kmcphillips/rails,vipulnsward/rails,rafaelfranca/omg-rails,palkan/rails,jeremy/rails,yalab/rails,Edouard-chin/rails,yalab/rails,mechanicles/rails,EmmaB/rails-1,shioyama/rails,BlakeWilliams/rails,yawboakye/rails,betesh/rails,joonyou/rails,schuetzm/rails,georgeclaghorn/rails,Envek/rails,palkan/rails,tgxworld/rails,rails/rails,repinel/rails,rails/rails,Erol/rails,yahonda/rails,starknx/rails,Stellenticket/rails,betesh/rails,utilum/rails,shioyama/rails,yahonda/rails,flanger001/rails,Erol/rails,gauravtiwari/rails,lcreid/rails,vipulnsward/rails,flanger001/rails,kddeisz/rails,joonyou/rails,rafaelfranca/omg-rails,mechanicles/rails,yahonda/rails,Envek/rails,kmcphillips/rails,lcreid/rails,iainbeeston/rails,bogdanvlviv/rails,arunagw/rails,kddeisz/rails,mechanicles/rails,fabianoleittes/rails,prathamesh-sonpatki/rails,BlakeWilliams/rails,MSP-Greg/rails,fabianoleittes/rails,arunagw/rails,Stellenticket/rails,georgeclaghorn/rails,Edouard-chin/rails,yhirano55/rails,vipulnsward/rails,BlakeWilliams/rails,iainbeeston/rails,Vasfed/rails,MSP-Greg/rails,jeremy/rails,notapatch/rails,MSP-Greg/rails,tgxworld/rails,fabianoleittes/rails,rails/rails,Envek/rails,mechanicles/rails,lcreid/rails,notapatch/rails,kmcphillips/rails,eileencodes/rails,palkan/rails,yhirano55/rails,BlakeWilliams/rails,schuetzm/rails,shioyama/rails,kddeisz/rails,georgeclaghorn/rails,esparta/rails,tjschuck/rails,starknx/rails,Edouard-chin/rails,eileencodes/rails,georgeclaghorn/rails,repinel/rails