rubocop -a --only Style/StringLiterals

Gemfile

@@ -1,12 +1,12 @@
 # frozen_string_literal: true
 
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
-eval_gemfile 'Gemfile.devtools'
+eval_gemfile "Gemfile.devtools"
 
 gemspec
 
 group :development, :test do
-  gem 'rake'
-  gem 'rspec', '~> 3.5'
+  gem "rake"
+  gem "rspec", "~> 3.5"
 end

Rakefile

@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
-require 'bundler'
+require "bundler"
 
 Bundler::GemHelper.install_tasks
 
-require 'rspec/core/rake_task'
+require "rspec/core/rake_task"
 
 RSpec::Core::RakeTask.new(:spec)
 task default: [:spec]

lib/dry-equalizer.rb

@@ -1,3 +1,3 @@
 # frozen_string_literal: true
 
-require 'dry/equalizer'
+require "dry/equalizer"

spec/spec_helper.rb

@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
-require_relative 'support/coverage'
+require_relative "support/coverage"
 
-require 'dry-equalizer'
+require "dry-equalizer"
 
 RSpec.configure do |config|
   config.raise_errors_for_deprecations!