style(rubocop): Style/StringLiterals

Gemfile

@@ -17,7 +17,7 @@ gem "gelf"
 gem "haml"
 gem "hashie"
 gem "highline", require: false
-gem "execjs", '~> 2.7', "< 2.8"
+gem "execjs", "~> 2.7", "< 2.8"
 gem "jwt"
 gem "kaminari"
 gem "mail"
@@ -30,8 +30,8 @@ gem "puma"
 gem "rails", "= 6.1.7.6"
 gem "resolv", "~> 0.2.1"
 gem "secure_headers"
-gem 'sentry-rails'
-gem 'sentry-ruby'
+gem "sentry-rails"
+gem "sentry-ruby"
 gem "turbolinks", "~> 5"
 
 group :development, :assets do

config/initializers/zeitwerk.rb

@@ -3,5 +3,5 @@
 Rails.autoloaders.each do |autoloader|
   # Ignore the message DB migrations directory as it doesn't follow
   # Zeitwerk's conventions and is always loaded and executed in order.
-  autoloader.ignore(Rails.root.join('lib/postal/message_db/migrations'))
+  autoloader.ignore(Rails.root.join("lib/postal/message_db/migrations"))
 end

script/send-html-email.rb

@@ -3,8 +3,8 @@
 # This script will automatically send an HTML email to the
 # SMTP server given.
 
-require 'mail'
-require 'net/smtp'
+require "mail"
+require "net/smtp"
 
 from = ARGV[0]
 to = ARGV[1]
@@ -19,7 +19,7 @@ mail = Mail.new
 mail.to = to
 mail.from = from
 mail.subject = "A test email from #{Time.now.to_s}"
-mail['X-Postal-Tag'] = 'send-html-email-script'
+mail["X-Postal-Tag"] = "send-html-email-script"
 mail.text_part = Mail::Part.new do
   body <<~BODY
     Hello there.
@@ -32,7 +32,7 @@ mail.text_part = Mail::Part.new do
   BODY
 end
 mail.html_part = Mail::Part.new do
-  content_type 'text/html; charset=UTF-8'
+  content_type "text/html; charset=UTF-8"
   body <<~BODY
     <p>Hello there</p>
     <p>This is an example email. It doesn't do all that much.</p>
@@ -43,7 +43,7 @@ end
 
 #puts mail.to_s
 
-Net::SMTP.start('127.0.0.1', 2525) do |smtp|
+Net::SMTP.start("127.0.0.1", 2525) do |smtp|
   smtp.send_message mail.to_s, mail.from.first, mail.to.first
 end
 

spec/lib/postal/message_db/connection_pool_spec.rb

@@ -6,8 +6,8 @@ describe Postal::MessageDB::ConnectionPool do
 
   subject(:pool) { described_class.new }
 
-  describe '#use' do
-    it 'yields a connection' do
+  describe "#use" do
+    it "yields a connection" do
       counter = 0
       pool.use do |connection|
         expect(connection).to be_a Mysql2::Client
@@ -16,7 +16,7 @@ describe Postal::MessageDB::ConnectionPool do
       expect(counter).to eq 1
     end
 
-    it 'checks in a connection after the block has executed' do
+    it "checks in a connection after the block has executed" do
       connection = nil
       pool.use do |c|
         expect(pool.connections).to be_empty
@@ -25,7 +25,7 @@ describe Postal::MessageDB::ConnectionPool do
       expect(pool.connections).to eq [connection]
     end
 
-    it 'checks in a connection if theres an error in the block' do
+    it "checks in a connection if theres an error in the block" do
       expect do
         pool.use do |c|
           raise StandardError
@@ -34,7 +34,7 @@ describe Postal::MessageDB::ConnectionPool do
       expect(pool.connections).to match [kind_of(Mysql2::Client)]
     end
 
-    it 'does not check in connections when there is a connection error' do
+    it "does not check in connections when there is a connection error" do
       expect do
         pool.use do
           raise Mysql2::Error, "lost connection to server"