Use boolean comparators where it makes sense

lib/capistrano/tasks/deploy_initial.cap

@@ -23,7 +23,7 @@ namespace :deploy do
       task :config => ['deploy:set_rails_env'] do
         require 'securerandom'
         on roles(:app), in: :groups do
-          db_name = (fetch(:db_user) or fetch(:application))
+          db_name = fetch(:db_user) || fetch(:application)
           db_passwd = SecureRandom.urlsafe_base64(24).to_s
           db_yaml = {
             fetch(:rails_env).to_s => {

lib/capistrano/tasks/plugins.cap

@@ -28,7 +28,7 @@ namespace :enable_plugins do
       text = capture :cat, shared_path.join('config/plugins.yml'), '||true'
       if text
         plugins = YAML.load(text)
-        enable_foodsoft_plugins(plugins['enabled']) if plugins and not plugins['enabled'].nil?
+        enable_foodsoft_plugins(plugins['enabled']) if plugins && !plugins['enabled'].nil?
       end
     end
   end

lib/capistrano/tasks/resque.cap

@@ -11,7 +11,7 @@ namespace :resque do
       on roles(:resque), in: :groups do
 
         SSHKit.config.command_map[:rake_as_run_user] =
-          unless fetch(:run_user).nil? or fetch(:run_user) == fetch(:user)
+          unless fetch(:run_user).nil? || fetch(:run_user) == fetch(:user)
             "sudo -u '#{fetch(:run_user)}' "
           else
             ''