diff --git a/app/validators/typoed_email_validator.rb b/app/validators/typoed_email_validator.rb
index 6c680a36..00830a9a 100644
--- a/app/validators/typoed_email_validator.rb
+++ b/app/validators/typoed_email_validator.rb
@@ -4,10 +4,8 @@ class TypoedEmailValidator < ActiveModel::EachValidator
   # this array contains "forbidden" email address endings
   INVALID_ENDINGS = [
     # without @:
-    *%w[
-      .con
-      .coom
-    ],
+    ".con",
+    ".coom",
 
     # with @:
     *%w[
@@ -31,10 +29,10 @@ class TypoedEmailValidator < ActiveModel::EachValidator
 
   def valid?(value)
     # needs an @
-    return false unless value.include?('@')
+    return false unless value.include?("@")
 
     # part after the @ needs to have at least one period
-    return false if value.split('@', 2).last.count('.') == 0
+    return false if value.split("@", 2).last.count(".").zero?
 
     # finally, common typos
     return false if INVALID_ENDINGS.any? { value.end_with?(_1) }
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index b5ed854a..09e89e3a 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -1,16 +1,16 @@
 # frozen_string_literal: true
 
-require 'rails_helper'
+require "rails_helper"
 
 RSpec.describe User, type: :model do
   let!(:me) { FactoryBot.create :user }
 
-  describe 'basic assigns' do
+  describe "basic assigns" do
     before :each do
       @user = User.new(
-        screen_name: 'FunnyMeme2004',
-        password: 'y_u_no_secure_password?',
-        email: 'nice.meme@nsa.gov'
+        screen_name: "FunnyMeme2004",
+        password:    "y_u_no_secure_password?",
+        email:       "nice.meme@nsa.gov"
       )
       Profile.new(user: @user)
     end
@@ -19,26 +19,26 @@ RSpec.describe User, type: :model do
 
     it { should respond_to(:email) }
 
-    it '#email returns a string' do
-      expect(@user.email).to match 'nice.meme@nsa.gov'
+    it "#email returns a string" do
+      expect(@user.email).to match "nice.meme@nsa.gov"
     end
 
-    it '#motivation_header has a default value' do
-      expect(@user.profile.motivation_header).to match ''
+    it "#motivation_header has a default value" do
+      expect(@user.profile.motivation_header).to match ""
     end
 
-    it 'does not save an invalid screen name' do
-      @user.screen_name = '$Funny-Meme-%&2004'
+    it "does not save an invalid screen name" do
+      @user.screen_name = "$Funny-Meme-%&2004"
       expect { @user.save! }.to raise_error(ActiveRecord::RecordInvalid)
     end
   end
 
-  describe 'email validation' do
+  describe "email validation" do
     subject do
       FactoryBot.build(:user, email: email).tap(&:validate).errors[:email]
     end
 
-    shared_examples_for 'valid email' do |example_email|
+    shared_examples_for "valid email" do |example_email|
       context "when email is #{example_email}" do
         let(:email) { example_email }
 
@@ -48,7 +48,7 @@ RSpec.describe User, type: :model do
       end
     end
 
-    shared_examples_for 'invalid email' do |example_email|
+    shared_examples_for "invalid email" do |example_email|
       context "when email is #{example_email}" do
         let(:email) { example_email }
 
@@ -58,62 +58,62 @@ RSpec.describe User, type: :model do
       end
     end
 
-    include_examples 'valid email', 'ifyouusethismailyouarebanned@nilsding.org'
-    include_examples 'valid email', 'fritz.fantom@gmail.com'
-    include_examples 'valid email', 'fritz.fantom@columbiamail.co'
-    include_examples 'valid email', 'fritz.fantom@protonmail.com'
-    include_examples 'valid email', 'fritz.fantom@enterprise.k8s.420stripes.k8s.needs.more.k8s.jira.atlassian.k8s.eu-central-1.s3.amazonaws.com'
-    include_examples 'invalid email', '@jack'
+    include_examples "valid email", "ifyouusethismailyouarebanned@nilsding.org"
+    include_examples "valid email", "fritz.fantom@gmail.com"
+    include_examples "valid email", "fritz.fantom@columbiamail.co"
+    include_examples "valid email", "fritz.fantom@protonmail.com"
+    include_examples "valid email", "fritz.fantom@enterprise.k8s.420stripes.k8s.needs.more.k8s.jira.atlassian.k8s.eu-central-1.s3.amazonaws.com"
+    include_examples "invalid email", "@jack"
 
     # examples from the real world:
 
     # .con is not a valid TLD
-    include_examples 'invalid email', 'fritz.fantom@gmail.con'
-    include_examples 'invalid email', 'fritz.fantom@protonmail.con'
+    include_examples "invalid email", "fritz.fantom@gmail.con"
+    include_examples "invalid email", "fritz.fantom@protonmail.con"
     # neither is .coom
-    include_examples 'invalid email', 'fritz.fantom@gmail.coom'
+    include_examples "invalid email", "fritz.fantom@gmail.coom"
     # common typos:
-    include_examples 'invalid email', 'fritz.fantom@fmail.com'
-    include_examples 'invalid email', 'fritz.fantom@gemail.com'
-    include_examples 'invalid email', 'fritz.fantom@gmail.co'
-    include_examples 'invalid email', 'fritz.fantom@gmailcom'
-    include_examples 'invalid email', 'fritz.fantom@gmaile.com'
-    include_examples 'invalid email', 'fritz.fantom@gmaill.com'
-    include_examples 'invalid email', 'fritz.fantom@hotmailcom'
-    include_examples 'invalid email', 'fritz.fantom@icluod.com'
+    include_examples "invalid email", "fritz.fantom@fmail.com"
+    include_examples "invalid email", "fritz.fantom@gemail.com"
+    include_examples "invalid email", "fritz.fantom@gmail.co"
+    include_examples "invalid email", "fritz.fantom@gmailcom"
+    include_examples "invalid email", "fritz.fantom@gmaile.com"
+    include_examples "invalid email", "fritz.fantom@gmaill.com"
+    include_examples "invalid email", "fritz.fantom@hotmailcom"
+    include_examples "invalid email", "fritz.fantom@icluod.com"
     # no TLD
-    include_examples 'invalid email', 'fritz.fantom@gmail'
-    include_examples 'invalid email', 'fritz.fantom@protonmail'
+    include_examples "invalid email", "fritz.fantom@gmail"
+    include_examples "invalid email", "fritz.fantom@protonmail"
     # not registered as of 2022-01-11
-    include_examples 'invalid email', 'fritz.fantom@proton.mail'
+    include_examples "invalid email", "fritz.fantom@proton.mail"
   end
 
   # -- User::TimelineMethods --
 
-  shared_examples_for 'result is blank' do
-    it 'result is blank' do
+  shared_examples_for "result is blank" do
+    it "result is blank" do
       expect(subject).to be_blank
     end
   end
 
-  describe '#timeline' do
+  describe "#timeline" do
     subject { me.timeline }
 
-    context 'user answered nothing and is not following anyone' do
-      include_examples 'result is blank'
+    context "user answered nothing and is not following anyone" do
+      include_examples "result is blank"
     end
 
-    context 'user answered something and is not following anyone' do
+    context "user answered something and is not following anyone" do
       let(:answer) { FactoryBot.create(:answer, user: me) }
 
       let(:expected) { [answer] }
 
-      it 'includes the answer' do
+      it "includes the answer" do
         expect(subject).to eq(expected)
       end
     end
 
-    context 'user answered something and follows users with answers' do
+    context "user answered something and follows users with answers" do
       let(:user1) { FactoryBot.create(:user) }
       let(:user2) { FactoryBot.create(:user) }
       let(:answer1) { FactoryBot.create(:answer, user: user1, created_at: 12.hours.ago) }
@@ -130,39 +130,39 @@ RSpec.describe User, type: :model do
         me.follow(user2)
       end
 
-      it 'includes all answers' do
+      it "includes all answers" do
         expect(subject).to include(answer1)
         expect(subject).to include(answer2)
         expect(subject).to include(answer3)
         expect(subject).to include(answer4)
       end
 
-      it 'result is ordered by created_at in reverse order' do
+      it "result is ordered by created_at in reverse order" do
         expect(subject).to eq(expected)
       end
     end
   end
 
-  describe '#cursored_timeline' do
+  describe "#cursored_timeline" do
     let(:last_id) { nil }
 
     subject { me.cursored_timeline(last_id: last_id, size: 3) }
 
-    context 'user answered nothing and is not following anyone' do
-      include_examples 'result is blank'
+    context "user answered nothing and is not following anyone" do
+      include_examples "result is blank"
     end
 
-    context 'user answered something and is not following anyone' do
+    context "user answered something and is not following anyone" do
       let(:answer) { FactoryBot.create(:answer, user: me) }
 
       let(:expected) { [answer] }
 
-      it 'includes the answer' do
+      it "includes the answer" do
         expect(subject).to eq(expected)
       end
     end
 
-    context 'user answered something and follows users with answers' do
+    context "user answered something and follows users with answers" do
       let(:user1) { FactoryBot.create(:user) }
       let(:user2) { FactoryBot.create(:user) }
       let!(:answer1) { FactoryBot.create(:answer, user: me, created_at: 1.day.ago) }
@@ -175,28 +175,28 @@ RSpec.describe User, type: :model do
         me.follow(user2)
       end
 
-      context 'last_id is nil' do
+      context "last_id is nil" do
         let(:last_id) { nil }
         let(:expected) do
           [answer4, answer3, answer2]
         end
 
-        it 'includes three answers' do
+        it "includes three answers" do
           expect(subject).not_to include(answer1)
           expect(subject).to include(answer2)
           expect(subject).to include(answer3)
           expect(subject).to include(answer4)
         end
 
-        it 'result is ordered by created_at in reverse order' do
+        it "result is ordered by created_at in reverse order" do
           expect(subject).to eq(expected)
         end
       end
 
-      context 'last_id is answer2.id' do
+      context "last_id is answer2.id" do
         let(:last_id) { answer2.id }
 
-        it 'includes answer1' do
+        it "includes answer1" do
           expect(subject).to include(answer1)
           expect(subject).not_to include(answer2)
           expect(subject).not_to include(answer3)
@@ -204,10 +204,10 @@ RSpec.describe User, type: :model do
         end
       end
 
-      context 'last_id is answer1.id' do
+      context "last_id is answer1.id" do
         let(:last_id) { answer1.id }
 
-        include_examples 'result is blank'
+        include_examples "result is blank"
       end
     end
   end