Fix warnings reported by latest RuboCop (0.47)

.rubocop.yml

@@ -3,6 +3,10 @@ AllCops:
   DisplayStyleGuide: true
   TargetRubyVersion: 2.0
 
+Metrics/BlockLength:
+  Exclude:
+    - "spec/**/*"
+    - "lib/**/*.rake"
 Style/BarePercentLiterals:
   EnforcedStyle: percent_q
 Style/ClassAndModuleChildren:

lib/capistrano/configuration/servers.rb

@@ -17,10 +17,12 @@ module Capistrano
         end
       end
 
+      # rubocop:disable Security/MarshalLoad
       def add_role(role, hosts, options={})
         options_deepcopy = Marshal.dump(options.merge(roles: role))
         Array(hosts).each { |host| add_host(host, Marshal.load(options_deepcopy)) }
       end
+      # rubocop:enable Security/MarshalLoad
 
       def roles_for(names)
         options = extract_options(names)

lib/capistrano/dsl.rb

@@ -59,10 +59,12 @@ module Capistrano
       VersionValidator.new(locked_version).verify
     end
 
+    # rubocop:disable Security/MarshalLoad
     def on(hosts, options={}, &block)
       subset_copy = Marshal.dump(Configuration.env.filter(hosts))
       SSHKit::Coordinator.new(Marshal.load(subset_copy)).each(options, &block)
     end
+    # rubocop:enable Security/MarshalLoad
 
     def run_locally(&block)
       SSHKit::Backend::Local.new(&block).run