Add "bin/bundle" to backtrace filters
Add "bin/bundle" to backtrace filters

- "bin/bundle" erroneously appears in some backtraces and needs to be
  filtered.
- Minor refactoring to improve readability of the filters.

cucumber/cucumber-ruby,enkessler/cucumber-ruby,cucumber/cucumber-ruby,enkessler/cucumber-ruby,enkessler/cucumber-ruby,cucumber/cucumber-ruby,phoebeclarke/cucumber-ruby,phoebeclarke/cucumber-ruby