correct rubocop offenses

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 gemspec

bin/licensee

@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require 'dotenv/load'
 require 'thor'

lib/licensee.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'licensee/version'
 require 'forwardable'
 require 'pathname'
@@ -19,7 +21,7 @@ module Licensee
   CONFIDENCE_THRESHOLD = 98
 
   # Base domain from which to build license URLs
-  DOMAIN = 'http://choosealicense.com'.freeze
+  DOMAIN = 'http://choosealicense.com'
 
   class << self
     attr_writer :confidence_threshold

lib/licensee/commands/detect.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class LicenseeCLI < Thor
   # Methods to call when displaying information about ProjectFiles
   MATCHED_FILE_METHODS = %i[

lib/licensee/commands/diff.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'tmpdir'
 
 class LicenseeCLI < Thor

lib/licensee/commands/license_path.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class LicenseeCLI < Thor
   desc 'license-path [PATH]', "Returns the path to the given project's license file"
   def license_path(_path)

lib/licensee/commands/version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class LicenseeCLI < Thor
   desc 'version', 'Return the Licensee version'
   def version

lib/licensee/content_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'set'
 require 'digest'
 
@@ -89,9 +91,7 @@ module Licensee
 
     # A set of each word in the license, without duplicates
     def wordset
-      @wordset ||= if content_normalized
-        content_normalized.scan(/(?:\w(?:'s|(?<=s)')?)+/).to_set
-      end
+      @wordset ||= content_normalized&.scan(/(?:\w(?:'s|(?<=s)')?)+/)&.to_set
     end
 
     # Number of characteres in the normalized content

lib/licensee/hash_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module HashHelper
     def to_h

lib/licensee/license.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'uri'
 
 module Licensee

lib/licensee/license_field.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   class LicenseField < Struct.new(:name, :description)
     class << self

lib/licensee/license_meta.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   class LicenseMeta < Struct.new(
     :title, :spdx_id, :source, :description, :how, :conditions, :permissions,

lib/licensee/license_rules.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   # Exposes #conditions, #permissions, and #limitation arrays of LicenseRules
   class LicenseRules < Struct.new(:conditions, :permissions, :limitations)

lib/licensee/matchers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     autoload :Matcher,   'licensee/matchers/matcher'

lib/licensee/matchers/cabal.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Cabal < Licensee::Matchers::Package

lib/licensee/matchers/cargo.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Cargo < Licensee::Matchers::Package

lib/licensee/matchers/copyright.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Copyright < Licensee::Matchers::Matcher

lib/licensee/matchers/cran.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Cran < Licensee::Matchers::Package

lib/licensee/matchers/dice.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Dice < Licensee::Matchers::Matcher

lib/licensee/matchers/dist_zilla.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class DistZilla < Licensee::Matchers::Package

lib/licensee/matchers/exact.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Exact < Licensee::Matchers::Matcher

lib/licensee/matchers/gemspec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Gemspec < Licensee::Matchers::Package

lib/licensee/matchers/matcher.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Matcher

lib/licensee/matchers/npm_bower.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class NpmBower < Licensee::Matchers::Package

lib/licensee/matchers/package.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Package < Licensee::Matchers::Matcher

lib/licensee/matchers/reference.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     # Matches README files that include a license by reference

lib/licensee/matchers/spdx.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Matchers
     class Spdx < Licensee::Matchers::Package

lib/licensee/project_files.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module ProjectFiles
     autoload :ProjectFile, 'licensee/project_files/project_file'

lib/licensee/project_files/license_file.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module ProjectFiles
     class LicenseFile < Licensee::ProjectFiles::ProjectFile
@@ -72,11 +74,11 @@ module Licensee
       end
 
       def gpl?
-        license && license.gpl?
+        license&.gpl?
       end
 
       def license
-        if matcher && matcher.match
+        if matcher&.match
           matcher.match
         else
           License.find('other')

lib/licensee/project_files/package_manager_file.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module ProjectFiles
     class PackageManagerFile < Licensee::ProjectFiles::ProjectFile

lib/licensee/project_files/project_file.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # A project file is a file within a project that contains license information
 # Currently extended by LicenseFile, PackageManagerFile, and ReadmeFile
 #
@@ -32,7 +34,7 @@ module Licensee
       #
       # Returns a new Licensee::ProjectFile
       def initialize(content, metadata = {})
-        @content = content
+        @content = content.dup
         @content.force_encoding(ENCODING)
         unless @content.valid_encoding?
           @content.encode!(ENCODING, ENCODING_OPTIONS)
@@ -70,17 +72,17 @@ module Licensee
 
       # Returns the percent confident with the match
       def confidence
-        matcher && matcher.confidence
+        matcher&.confidence
       end
 
       def license
-        matcher && matcher.match
+        matcher&.match
       end
 
       alias match license
 
       def matched_license
-        license.spdx_id if license
+        license&.spdx_id
       end
 
       # Is this file a COPYRIGHT file with only a copyright statement?

lib/licensee/project_files/readme_file.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module ProjectFiles
     class ReadmeFile < Licensee::ProjectFiles::LicenseFile

lib/licensee/projects.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   module Projects
     autoload :Project, 'licensee/projects/project'

lib/licensee/projects/fs_project.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Filesystem-based project
 #
 # Analyze a folder on the filesystem for license information

lib/licensee/projects/git_project.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Git-based project
 #
 # Analyze a given (bare) Git repository for license information

lib/licensee/projects/github_project.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # GitHub project
 #
 # Analyses a remote GitHub repository for license information

lib/licensee/projects/project.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Licensee::Project represents an open source project on disk
 # It is not used directly, but rather is extended by FSProject and GitProject
 # depending on the type of file system access available
@@ -113,7 +115,7 @@ module Licensee
         return [] if files.empty? || files.nil?
 
         found = files.map { |file| file.merge(score: yield(file[:name])) }
-        found.select! { |file| file[:score] > 0 }
+        found.select! { |file| file[:score].positive? }
         found.sort { |a, b| b[:score] <=> a[:score] }
       end
 
@@ -137,7 +139,7 @@ module Licensee
       # Returns an array of LicenseFiles with LPGL first
       def prioritize_lgpl(files)
         return files if files.empty?
-        return files unless files.first.license && files.first.license.gpl?
+        return files unless files.first.license&.gpl?
 
         lesser = files.find_index(&:lgpl?)
         files.unshift(files.delete_at(lesser)) if lesser

lib/licensee/rule.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
   class Rule
     attr_reader :tag, :label, :description, :group

lib/licensee/version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Licensee
-  VERSION = '9.11.0'.freeze
+  VERSION = '9.11.0'
 end

licensee.gemspec

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require File.expand_path('lib/licensee/version', __dir__)
 
 Gem::Specification.new do |gem|
@@ -32,7 +34,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency('simplecov', '~> 0.16')
   gem.add_development_dependency('webmock', '~> 3.1')
 
-  gem.required_ruby_version = '> 2.2'
+  gem.required_ruby_version = '> 2.3'
 
   # ensure the gem is built out of versioned files
   gem.files = Dir[

script/dump-detect-json-fixture

@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require 'json'
 require 'licensee'

script/dump-fixture-licenses

@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require_relative '../spec/spec_helper.rb'
 
@@ -14,7 +15,7 @@ fixtures.each do |fixture|
   if project.license_file
     expectations['hash'] = project.license_file.content_hash
 
-    if project.license_file.matcher && project.license_file.matcher.name
+    if project.license_file.matcher&.name
       expectations['matcher'] = project.license_file.matcher.name.to_s
     end
   end

script/hash-licenses

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 # Write current license hashes to spec/fixtures/license-hashes.json
 
 require 'json'

spec/bin_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'command line invocation' do
   let(:command) { ['bundle', 'exec', 'bin/licensee', 'help'] }
   let(:arguments) { [] }

spec/fixture_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'fixture test' do
   fixtures.each do |fixture|
     let(:options) { { detect_packages: true, detect_readme: true } }
@@ -8,13 +10,14 @@ RSpec.describe 'fixture test' do
       let(:none) { Licensee::License.find('none') }
       let(:expectations) { fixture_licenses[fixture] || {} }
       let(:license_file) { subject.license_file }
-      let(:matcher) { license_file.matcher if license_file }
+      let(:matcher) { license_file&.matcher }
 
       subject { Licensee.project(path, options) }
 
       it 'has an expected license in fixtures-licenses.yml' do
-        msg = "Expected an entry in `#{fixture_path('fixtures-licenses.yml')}` "
-        msg << "for the `#{fixture}` fixture. Please run "
+        msg = 'Expected an entry in `'.dup
+        msg << fixture_path('fixtures-licenses.yml')
+        msg << "` for the `#{fixture}` fixture. Please run "
         msg << 'script/dump-fixture-licenses and confirm the output.'
         expect(fixture_licenses).to have_key(fixture), msg
       end

spec/integration_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'integration test' do
   [
     Licensee::Projects::FSProject,

spec/licensee/commands/detect_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'detect command' do
   let(:command) { ['bundle', 'exec', 'bin/licensee', 'detect'] }
   let(:arguments) { [] }
@@ -68,7 +70,7 @@ RSpec.describe 'detect command' do
     end
 
     it 'returns the expected output' do
-      msg = '`licensee detect --json` output did not match expectations. '
+      msg = '`licensee detect --json` output did not match expectations. '.dup
       msg << 'Run `script/dump-detect-json-fixture` and verify the output.'
       expect(JSON.parse(stdout)).to eql(expected), msg
     end

spec/licensee/commands/license_path_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'license-path command' do
   let(:command) { ['bundle', 'exec', 'bin/licensee', 'license-path'] }
   let(:arguments) { [project_root] }

spec/licensee/commands/version_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe 'version command' do
   let(:command) { ['bundle', 'exec', 'bin/licensee', 'version'] }
   let(:arguments) { [] }

spec/licensee/content_helper_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ContentHelperTestHelper
   include Licensee::ContentHelper
   attr_accessor :content, :data
@@ -14,7 +16,7 @@ end
 
 RSpec.describe Licensee::ContentHelper do
   let(:content) do
-    <<-LICENSE.freeze.gsub(/^\s*/, '')
+    <<-LICENSE.gsub(/^\s*/, '')
   # The MIT License
 	=================
 
@@ -186,7 +188,7 @@ RSpec.describe Licensee::ContentHelper do
     end
 
     it 'normalize the content' do
-      expected = 'the made up license. this license provided "as is". '
+      expected = 'the made up license. this license provided "as is". '.dup
       expected << "please respect the contributors' wishes when implementing "
       expected << "the license's \"software\"."
       expect(normalized_content).to eql(expected)

spec/licensee/hash_helper_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::HashHelper do
   class HashHelperSpecFixture
     include Licensee::HashHelper

spec/licensee/license_field_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::LicenseField do
   let(:expected_count) { 7 }
 

spec/licensee/license_meta_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::LicenseMeta do
   subject { Licensee::License.find('mit').meta }
 

spec/licensee/license_rules_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::LicenseRules do
   let(:mit) { Licensee::License.find('mit') }
   subject { mit.rules }

spec/licensee/license_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::License do
   let(:license_count) { 37 }
   let(:hidden_license_count) { 25 }

spec/licensee/matchers/cabal_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Cabal do
   let(:content) { 'license: mit' }
   let(:file) { Licensee::ProjectFiles::LicenseFile.new(content, 'LICENSE.txt') }

spec/licensee/matchers/cargo_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Cargo do
   let(:mit) { Licensee::License.find('mit') }
   let(:content) { 'license = "MIT"' }

spec/licensee/matchers/copyright_matcher_spec.rb

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Copyright do
-  let(:content) { 'Copyright 2015 Ben Balter' }
+  let(:content) { 'Copyright 2015 Ben Balter'.dup }
   let(:file) { Licensee::ProjectFiles::LicenseFile.new(content, 'LICENSE.txt') }
   let(:mit) { Licensee::License.find('mit') }
   let(:no_license) { Licensee::License.find('no-license') }
@@ -28,7 +30,7 @@ RSpec.describe Licensee::Matchers::Copyright do
     'ASCII-8BIT encoded'    => "Copyright \xC2\xA92015 Ben Balter`",
     'No year'               => 'Copyright Ben Balter',
     'Multiline'             => "Copyright Ben Balter\nCopyright Another Entity"
-      .force_encoding('ASCII-8BIT')
+      .dup.force_encoding('ASCII-8BIT')
   }.each do |description, notice|
     context "with a #{description} notice" do
       let(:content) { notice }

spec/licensee/matchers/cran_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Cran do
   let(:mit) { Licensee::License.find('mit') }
   let(:gpl2) { Licensee::License.find('gpl-2.0') }

spec/licensee/matchers/dice_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Dice do
   let(:mit) { Licensee::License.find('mit') }
   let(:gpl) { Licensee::License.find('gpl-3.0') }

spec/licensee/matchers/dist_zilla_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::DistZilla do
   let(:mit) { Licensee::License.find('mit') }
   let(:content) { 'license = MIT' }

spec/licensee/matchers/exact_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Exact do
   let(:mit) { Licensee::License.find('mit') }
   let(:content) { sub_copyright_info(mit) }

spec/licensee/matchers/gemspec_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Gemspec do
   let(:mit) { Licensee::License.find('mit') }
   let(:content) { "s.license = 'mit'" }

spec/licensee/matchers/matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Matcher do
   let(:mit) { Licensee::License.find('mit') }
   let(:content) { sub_copyright_info(mit) }

spec/licensee/matchers/npm_bower_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::NpmBower do
   let(:content) { '"license": "mit"' }
   let(:file) { Licensee::ProjectFiles::LicenseFile.new(content, 'LICENSE.txt') }

spec/licensee/matchers/package_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Package do
   let(:mit) { Licensee::License.find('mit') }
   let(:content) { '' }

spec/licensee/matchers/reference_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Reference do
   let(:content) { 'Copyright 2015 Ben Balter' }
   let(:file) { Licensee::ProjectFiles::LicenseFile.new(content, 'LICENSE.txt') }

spec/licensee/matchers/spdx_matcher_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Matchers::Spdx do
   let(:content) { 'PackageLicenseDeclared: MIT' }
   let(:file) do

spec/licensee/project_files/license_file_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::ProjectFiles::LicenseFile do
   let(:filename) { 'LICENSE.txt' }
   let(:gpl) { Licensee::License.find('gpl-3.0') }
@@ -20,7 +22,7 @@ RSpec.describe Licensee::ProjectFiles::LicenseFile do
   end
 
   context 'with an non-UTF-8-encoded license' do
-    let(:content) { "\x91License\x93".force_encoding('windows-1251') }
+    let(:content) { "\x91License\x93".dup.force_encoding('windows-1251') }
 
     it "doesn't blow up " do
       expect(subject.attribution).to be_nil

spec/licensee/project_files/package_info_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::ProjectFiles::PackageManagerFile do
   let(:content) { '' }
   let(:filename) { '' }

spec/licensee/project_files/project_file_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::ProjectFiles::ProjectFile do
   let(:filename) { 'LICENSE.txt' }
   let(:mit) { Licensee::License.find('mit') }

spec/licensee/project_files/readme_file_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::ProjectFiles::ReadmeFile do
   let(:filename) { 'README.md' }
   let(:content) { '' }

spec/licensee/project_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 [
   Licensee::Projects::FSProject,
   Licensee::Projects::GitProject,

spec/licensee/projects/git_project_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Projects::GitProject do
   let(:fixture) { 'mit' }
 

spec/licensee/projects/github_project_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Projects::GitHubProject do
   let(:repo) { 'benbalter/licensee' }
   let(:github_url) { "https://github.com/#{repo}" }

spec/licensee/rule_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee::Rule do
   let(:groups) { %w[permissions conditions limitations] }
   subject do

spec/licensee_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.describe Licensee do
   let(:project_path) { fixture_path('mit') }
   let(:license_path) { fixture_path('mit/LICENSE.txt') }

spec/spec_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'simplecov'
 SimpleCov.start
 

spec/vendored_license_spec.rb

@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 RSpec.describe 'vendored licenses' do
   let(:filename) { 'LICENSE.txt' }
   let(:license_file) do
     Licensee::ProjectFiles::LicenseFile.new(content, filename)
   end
-  let(:detected_license) { license_file.license if license_file }
+  let(:detected_license) { license_file&.license }
   let(:wtfpl) { Licensee::License.find('wtfpl') }
 
   Licensee.licenses(hidden: true).each do |license|
@@ -15,7 +17,7 @@ RSpec.describe 'vendored licenses' do
       let(:content) { content_with_copyright }
       let(:expected_hash) { license_hashes[license.key] }
       let(:hash_change_msg) do
-        msg = 'Did you update a vendored license? Run'
+        msg = 'Did you update a vendored license? Run'.dup
         msg << '    bundle exec script/hash-licenses'
         msg << 'Changes in license hashes must be a MINOR (or MAJOR) bump.'
         msg