Guardfile in grape-0.9.0 vs Guardfile in grape-0.10.0

@@ -1,8 +1,8 @@
 guard :rspec, all_on_start: true, cmd: 'bundle exec rspec' do
   watch(%r{^spec/.+_spec\.rb$})
   watch(%r{^lib/(.+)\.rb$})     { |m| "spec/#{m[1]}_spec.rb" }
-  watch('spec/spec_helper.rb')  { "spec" }
+  watch('spec/spec_helper.rb')  { 'spec' }
 end
 
 guard :rubocop do
   watch(%r{.+\.rb$})
   watch(%r{(?:.+/)?\.rubocop\.yml$}) { |m| File.dirname(m[0]) }