Use frozen strings by default

 (#2202)

* Use frozen strings by default

* remove duplicated comments

Co-authored-by: Oleg Pudeyev <oleg@bsdpower.com>

Author: p-mongo

examples/aggregate.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Group documents by field and calculate count.
 
 coll = client[:restaurants]

examples/create.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Insert a document
 
 require 'date'

examples/delete.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Delete all documents matching a condition
 
 client[:restaurants].find('borough' => 'Manhattan').delete_many

examples/index.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Create a single field index
 
 result = client[:restaurants].indexes.create_one(cuisine: Mongo::Index::ASCENDING)

examples/query.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Query for all documents in a collection
 
 cursor = client[:restaurants].find

examples/update.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Update top-level fields in a single document
 
 client[:restaurants].find(name: 'Juni').update_one('$set'=> { 'cuisine' => 'American (New)' },

gemfiles/standard.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 def standard_dependencies
   gem 'yard'
   gem 'ffi'

lib/mongo.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/active_support.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2019-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/address.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');

lib/mongo/address/ipv4.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');

lib/mongo/address/ipv6.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');

lib/mongo/address/unix.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');

lib/mongo/address/validator.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2017-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the 'License');

lib/mongo/auth.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/aws.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/aws/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/aws/credentials_retriever.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/aws/request.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/base.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/conversation_base.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/cr.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/cr/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/credential_cache.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2019-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/gssapi.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/gssapi/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/ldap.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/ldap/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/roles.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/sasl_conversation_base.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/scram.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/scram/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/scram256.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/scram256/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/scram_conversation_base.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/stringprep.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2018-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -59,7 +62,7 @@ def prepare(data, mappings, prohibited, options = {})
       private
 
       def apply_maps(data, mappings)
-        data.each_char.inject('') do |out, c|
+        data.each_char.inject(+'') do |out, c|
           out << mapping(c.ord, mappings)
         end
       end

lib/mongo/auth/stringprep/profiles/sasl.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2018-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/stringprep/tables.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2018-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/stringprep/unicode_normalize/normalize.rb

@@ -1,5 +1,5 @@
-# coding: utf-8
-# frozen_string_literal: false
+# frozen_string_literal: true
+# encoding: utf-8
 
 # Copyright Ayumu Nojima (野島 歩) and Martin J. Dürst (duerst@it.aoyama.ac.jp)
 

lib/mongo/auth/stringprep/unicode_normalize/tables.rb

@@ -1,5 +1,5 @@
-# coding: us-ascii
 # frozen_string_literal: true
+# encoding: us-ascii
 
 # automatically generated by template/unicode_norm_gen.tmpl
 

lib/mongo/auth/user.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/user/view.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/x509.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/auth/x509/conversation.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/background_thread.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2019-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bson.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2014-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/combineable.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/ordered_combiner.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/result.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/result_combiner.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/transformable.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/unordered_combiner.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/bulk_write/validatable.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2015-2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

lib/mongo/caching_cursor.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+# encoding: utf-8
+
 # Copyright (C) 2020 MongoDB Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");