style: enable Style/SingleLineMethods rubocop

.rubocop.yml

@@ -55,3 +55,6 @@ Style/RedundantBegin:
 
 Style/RedundantFreeze:
   Enabled: true
+
+Style/SingleLineMethods:
+  Enabled: true

lib/rack/attack.rb

@@ -67,13 +67,21 @@ class Rack::Attack
       self.tracks[name] = Track.new(name, options, block)
     end
 
-    def safelists;  @safelists  ||= {}; end
+    def safelists;
+      @safelists  ||= {};
+    end
 
-    def blocklists; @blocklists ||= {}; end
+    def blocklists;
+      @blocklists ||= {};
+    end
 
-    def throttles;  @throttles  ||= {}; end
+    def throttles;
+      @throttles  ||= {};
+    end
 
-    def tracks;     @tracks     ||= {}; end
+    def tracks;
+      @tracks     ||= {};
+    end
 
     def safelisted?(request)
       anonymous_safelists.any? { |safelist| safelist.matched_by?(request) } ||

lib/rack/attack/store_proxy/dalli_proxy.rb

@@ -60,7 +60,9 @@ module Rack
         def stub_with_if_missing
           unless __getobj__.respond_to?(:with)
             class << self
-              def with; yield __getobj__; end
+              def with;
+                yield __getobj__;
+              end
             end
           end
         end