Slightly improve spec readability
Slightly improve spec readability

stijnster/appsignal-ruby,appsignal/appsignal-ruby,rranelli/appsignal,codefarmdev/haystack,matrinox/appsignal-ruby,subvisual/appsignal,matrinox/appsignal-ruby,appsignal/appsignal-ruby,appsignal/appsignal,q-m/appsignal,stijnster/appsignal-ruby,appsignal/appsignal-ruby,matrinox/appsignal-ruby,appsignal/appsignal-ruby,stijnster/appsignal-ruby,appsignal/appsignal