Rubocop autocorrect specs

spec/models/paper_spec.rb

@@ -1,22 +1,24 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe Paper do
-  context "Validations" do
+  context 'Validations' do
     it { should validate_presence_of(:name) }
-    it { should validate_length_of(:name).is_at_most(1000) } 
-    
+    it { should validate_length_of(:name).is_at_most(1000) }
+
     it { should validate_presence_of(:url) }
     it { should validate_length_of(:url).is_at_most(1000) }
-    
-    context "URL uniqueness" do
+
+    context 'URL uniqueness' do
       subject { FactoryBot.build(:paper) }
       it { should validate_uniqueness_of(:url) }
     end
-    
-    it "validate url format sane" do
-      expected_error = "ist keine gültige URL"
-      paper = FactoryBot.build(:paper, url: "wtf")
-      expect(paper).not_to be_valid, "Expected paper to not be valid with invalid URL"
+
+    it 'validate url format sane' do
+      expected_error = 'ist keine gültige URL'
+      paper = FactoryBot.build(:paper, url: 'wtf')
+      expect(paper).not_to be_valid, 'Expected paper to not be valid with invalid URL'
       expect(paper.errors[:url]).not_to be_empty
       expect(paper.errors[:url]).to include(expected_error), "Expected #{paper.errors[:url]} to include \"#{expected_error}\""
     end
@@ -36,11 +38,11 @@ RSpec.describe Paper do
     it { should validate_presence_of(:paper_type) }
     it { should validate_length_of(:paper_type).is_at_most(50) }
 
-    context "published_at" do
+    context 'published_at' do
       it { should validate_presence_of(:published_at) }
-      it "validate date is parseable" do
-        expected_error = "ist kein gültiges Datum"
-        paper = FactoryBot.build(:paper, published_at: "fubar")
+      it 'validate date is parseable' do
+        expected_error = 'ist kein gültiges Datum'
+        paper = FactoryBot.build(:paper, published_at: 'fubar')
         expect(paper).not_to be_valid
         expect(paper.errors[:published_at]).not_to be_empty
         expect(paper.errors[:published_at]).to include(expected_error), "Expected #{paper.errors[:published_at]} to include \"#{expected_error}\""