[rubygems/rubygems] Deprecate the --no-deployment flag

And never recommend it inside CLI messages.

This flag represents the default behaviour of `bundle install`, and the
only reason it exists is to "override" previous `--deployment` flag
usages which were silently remembered. So it should be deprecated just
like all the other flags the rely on remembering their values across
invocations.

https://github.com/rubygems/rubygems/commit/40e50b7190

lib/bundler/cli.rb

@@ -254,6 +254,8 @@ module Bundler
         remembered_flag_deprecation(option)
       end
 
+      remembered_negative_flag_deprecation("no-deployment")
+
       require_relative "cli/install"
       Bundler.settings.temporary(:no_install => false) do
         Install.new(options.dup).run
@@ -812,10 +814,22 @@ module Bundler
       nil
     end
 
+    def remembered_negative_flag_deprecation(name)
+      positive_name = name.gsub(/\Ano-/, "")
+      option = current_command.options[positive_name]
+      flag_name = "--no-" + option.switch_name.gsub(/\A--/, "")
+
+      flag_deprecation(positive_name, flag_name, option)
+    end
+
     def remembered_flag_deprecation(name)
       option = current_command.options[name]
       flag_name = option.switch_name
 
+      flag_deprecation(name, flag_name, option)
+    end
+
+    def flag_deprecation(name, flag_name, option)
       name_index = ARGV.find {|arg| flag_name == arg.split("=")[0] }
       return unless name_index
 

spec/bundler/other/major_deprecation_spec.rb

@@ -318,6 +318,7 @@ RSpec.describe "major deprecations" do
       "deployment" => ["deployment", true],
       "frozen" => ["frozen", true],
       "no-cache" => ["no_cache", true],
+      "no-deployment" => ["deployment", false],
       "no-prune" => ["no_prune", true],
       "path" => ["path", "vendor/bundle"],
       "shebang" => ["shebang", "ruby27"],