fix custom matcher example
fix custom matcher example

everydayrails/rspec_rails_4,zaru/rials_rspec_sample_book,emilyforst/rspec_rails_4,oliverswitzer/EverydayRails-Rspec-Practice,mayormcmatt/everyday_rails_rspec,emerak/everydayrails,little-hands/everyday_rails,mayormcmatt/everyday_rails_rspec,zaru/rials_rspec_sample_book,mach1010/rspec_rails_4,emilyforst/rspec_rails_4,emerak/everydayrails,mach1010/rspec_rails_4,prmsh99/rspec_rails_4,sakthivelsekar33/rspec_for_rails,palytoxin/rspec_test,oliverswitzer/EverydayRails-Rspec-Practice,palytoxin/rspec_test,sakthivelsekar33/rspec_for_rails,emilyforst/rspec_rails_4,prmsh99/rspec_rails_4,little-hands/everyday_rails,everydayrails/rspec_rails_4