Directly start the consistent new bin/dev after setup

Author: dhh

railties/lib/rails/generators/rails/app/templates/bin/setup.tt

@@ -38,10 +38,6 @@ FileUtils.chdir APP_ROOT do
   puts "\n== Removing old logs and tempfiles =="
   system! "bin/rails log:clear tmp:clear"
 
-  puts "\n== Restarting application server =="
-  system! "bin/rails restart"
-
-  # puts "\n== Configuring puma-dev =="
-  # system "ln -nfs #{APP_ROOT} ~/.puma-dev/#{APP_NAME}"
-  # system "curl -Is https://#{APP_NAME}.test/up | head -n 1"
+  puts "\n== Starting development server =="
+  exec "bin/dev"
 end