rubocop fixes

Author: martinemde

Gemfile

@@ -2,4 +2,4 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'rake-compiler', '~> 1.3.0'
+gem 'rake-compiler', '~> 1.3.0'

lib/code_ownership.rb

@@ -2,7 +2,6 @@
 
 # typed: strict
 
-require 'set'
 require 'code_teams'
 require 'sorbet-runtime'
 require 'json'

lib/code_ownership/cli.rb

@@ -65,7 +65,7 @@ def self.validate!(argv)
       files = if !specified_files.empty?
                 # Files explicitly provided on command line
                 if options[:diff]
-                  $stderr.puts "Warning: Ignoring --diff flag because explicit files were provided"
+                  warn 'Warning: Ignoring --diff flag because explicit files were provided'
                 end
                 specified_files.select { |file| File.exist?(file) }
               elsif options[:diff]

lib/code_ownership/private/for_file_output_builder.rb

@@ -6,6 +6,7 @@ module CodeOwnership
   module Private
     class ForFileOutputBuilder
       extend T::Sig
+
       private_class_method :new
 
       sig { params(file_path: String, json: T::Boolean, verbose: T::Boolean).void }

spec/lib/code_ownership/cli_spec.rb

@@ -79,7 +79,7 @@
         end
 
         it 'prioritizes explicit files over git diff and warns the user' do
-          expect($stderr).to receive(:puts).with("Warning: Ignoring --diff flag because explicit files were provided")
+          expect($stderr).to receive(:puts).with('Warning: Ignoring --diff flag because explicit files were provided')
           expect(CodeOwnership).to receive(:validate!) do |args|
             expect(args[:files]).to eq(['app/services/my_file.rb'])
           end