rubocop -a --only Style/StringLiterals

Gemfile

@@ -1,18 +1,18 @@
 # frozen_string_literal: true
 
-source 'https://rubygems.org'
+source "https://rubygems.org"
 
-eval_gemfile 'Gemfile.devtools'
+eval_gemfile "Gemfile.devtools"
 
 gemspec
 
 group :test do
-  gem 'dry-monads', '~> 1.2.0'
-  gem 'rspec', '~> 3.8'
+  gem "dry-monads", "~> 1.2.0"
+  gem "rspec", "~> 3.8"
 end
 
 group :tools do
-  gem 'yard'
-  gem 'byebug', platform: :mri
-  gem 'pry'
+  gem "yard"
+  gem "byebug", platform: :mri
+  gem "pry"
 end

Rakefile

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
-require 'bundler/gem_tasks'
-require 'rspec/core/rake_task'
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
 
 RSpec::Core::RakeTask.new
 

lib/dry-matcher.rb

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

lib/dry/matcher.rb

@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
-require 'dry/core/constants'
-require 'dry/matcher/case'
-require 'dry/matcher/evaluator'
+require "dry/core/constants"
+require "dry/matcher/case"
+require "dry/matcher/evaluator"
 
 module Dry
   # @see http://dry-rb.org/gems/dry-matcher

spec/spec_helper.rb

@@ -1,14 +1,14 @@
 # frozen_string_literal: true
 
-require_relative 'support/coverage'
-require_relative 'support/warnings'
+require_relative "support/coverage"
+require_relative "support/warnings"
 
 begin
-  require 'byebug'
+  require "byebug"
 rescue LoadError; end
-require 'dry-matcher'
+require "dry-matcher"
 
-Dir[File.join(File.dirname(__FILE__), 'support/**/*.rb')].each { |f| require f }
+Dir[File.join(File.dirname(__FILE__), "support/**/*.rb")].each { |f| require f }
 
 RSpec.configure do |config|
   config.disable_monkey_patching!
@@ -26,7 +26,7 @@
   # Allows RSpec to persist some state between runs in order to support
   # the `--only-failures` and `--next-failure` CLI options. We recommend
   # you configure your source control system to ignore this file.
-  config.example_status_persistence_file_path = 'spec/examples.txt'
+  config.example_status_persistence_file_path = "spec/examples.txt"
 
   # This setting enables warnings. It's recommended, but in some cases may
   # be too noisy due to issues in dependencies.
@@ -38,7 +38,7 @@
   if config.files_to_run.one?
     # Use the documentation formatter for detailed output, unless a formatter
     # has already been configured (e.g. via a command-line flag).
-    config.default_formatter = 'doc'
+    config.default_formatter = "doc"
   end
 
   # Run specs in random order to surface order dependencies. If you find an