chore: Fix linting warnings

.rubocop.yml

@@ -1,8 +1,17 @@
-inherit_from: .rubocop_todo.yml
-
 inherit_gem:
   rubocop-config: default.yml
 
 AllCops:
   TargetRubyVersion: 2.7
   SuggestExtensions: False
+
+Naming/FileName:
+  Exclude:
+    - lib/rails-timeago.rb
+
+RSpec/NestedGroups:
+  Enabled: False
+
+RSpec/SpecFilePathFormat:
+  Exclude:
+    - spec/timeago/helper_spec.rb

lib/rails-timeago.rb

@@ -52,8 +52,9 @@ class Engine < ::Rails::Engine # :nodoc:
     def self.default_options(opts = nil)
       @defaults ||= option_hash
       if opts
-        @defaults.merge! \
-          opts.extract!(*@defaults.keys.select {|k| opts.include?(k) })
+        @defaults.merge!(
+          opts.extract!(*@defaults.keys.select {|k| opts.include?(k) }),
+        )
       else
         @defaults
       end

spec/support/stub.rb

@@ -67,7 +67,7 @@ def call_render
   end
 
   def call_asset
-    if (file = find_asset(@request.path[8..-1]))
+    if (file = find_asset(@request.path[8..]))
       [200, {'Content-Type' => 'text/javascript'}, [file.read]]
     else
       [404, {}, []]

spec/timeago_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe 'rails-timeago', js: true, type: :feature do
+RSpec.describe 'rails-timeago', :js, type: :feature do
   subject(:element) { find 'body > time' }
 
   let(:time) { 2.days.ago }