Rename respond_to? method to respond_to_missing? to fix warning

[denny]

The call to respond_to? in the route delegator started throwing copious warnings into my logs when I moved to Ruby 3.0.0; this change fixes it.

[denny]

denny@rocinante:~/code/denny/rails_email_preview$ git status
On branch master
Your branch is up-to-date with 'origin/master'.

nothing to commit, working tree clean
denny@rocinante:~/code/denny/rails_email_preview$ ruby -v
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux]
denny@rocinante:~/code/denny/rails_email_preview$ rspec
........Capybara starting Puma...
* Version 5.2.2 , codename: Fettisdagsbulle
* Min threads: 0, max threads: 4
* Listening on http://127.0.0.1:7000
saving screenshot: list.png
.saving screenshot: list-de.png
.saving screenshot: show.png
.......       exist  app/mailer_previews
       exist  app/mailer_previews/auth_mailer_preview.rb
      create  app/mailer_previews/new_mailer_preview.rb
       exist  app/mailer_previews/newsletter_mailer_preview.rb
        skip  application_mailer
.

Finished in 1.47 seconds (files took 0.91953 seconds to load)
18 examples, 0 failures

denny@rocinante:~/code/denny/rails_email_preview$ rvm use 3
Using /home/denny/.rvm/gems/ruby-3.0.0
denny@rocinante:~/code/denny/rails_email_preview$ ruby -v
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]
denny@rocinante:~/code/denny/rails_email_preview$ rspec
......./home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
.Capybara starting Puma...
* Version 5.2.2 , codename: Fettisdagsbulle
* Min threads: 0, max threads: 4
* Listening on http://127.0.0.1:7000
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
saving screenshot: list.png
./home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
saving screenshot: list-de.png
./home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
/home/denny/code/denny/rails_email_preview/lib/rails_email_preview/main_app_route_delegator.rb:11: warning: respond_to? is defined here
saving screenshot: show.png
.......       exist  app/mailer_previews
        skip  application_mailer
       exist  app/mailer_previews/auth_mailer_preview.rb
      create  app/mailer_previews/new_mailer_preview.rb
       exist  app/mailer_previews/newsletter_mailer_preview.rb
.

Finished in 1.51 seconds (files took 1.09 seconds to load)
18 examples, 0 failures

denny@rocinante:~/code/denny/rails_email_preview$ git checkout fix/ruby-3.0-respond-to-warning 
Switched to branch 'fix/ruby-3.0-respond-to-warning'
denny@rocinante:~/code/denny/rails_email_preview$ git diff master
diff --git a/lib/rails_email_preview/main_app_route_delegator.rb b/lib/rails_email_preview/main_app_route_delegator.rb
index 87b5e92..92e7f63 100644
--- a/lib/rails_email_preview/main_app_route_delegator.rb
+++ b/lib/rails_email_preview/main_app_route_delegator.rb
@@ -8,7 +8,7 @@ module RailsEmailPreview::MainAppRouteDelegator
     end
   end

-  def respond_to?(method)
+  def respond_to_missing?(method)
     super || main_app_route_method?(method)
   end

denny@rocinante:~/code/denny/rails_email_preview$ rspec
........Capybara starting Puma...
* Version 5.2.2 , codename: Fettisdagsbulle
* Min threads: 0, max threads: 4
* Listening on http://127.0.0.1:7000
saving screenshot: list.png
.saving screenshot: list-de.png
.saving screenshot: show.png
.......       exist  app/mailer_previews
        skip  application_mailer
       exist  app/mailer_previews/auth_mailer_preview.rb
      create  app/mailer_previews/new_mailer_preview.rb
       exist  app/mailer_previews/newsletter_mailer_preview.rb
.

Finished in 1.62 seconds (files took 1.11 seconds to load)
18 examples, 0 failures

denny@rocinante:~/code/denny/rails_email_preview$