[ruby/rubygems] Tweak the Bundler's "X gems now installed message":

- Fix ruby/rubygems#9188
- This message is a bit misleading because it always outputs one extra
  specs, which is Bundler itself.

  This is now fixed when the message is about to be output.

ruby/rubygems@70b4e19506

Author: Edouard-chin

lib/bundler/cli/install.rb

@@ -90,7 +90,7 @@ def dependencies_count_for(definition)
     end
 
     def gems_installed_for(definition)
-      count = definition.specs.count
+      count = definition.specs.count {|spec| spec.name != "bundler" }
       "#{count} #{count == 1 ? "gem" : "gems"} now installed"
     end
 

spec/bundler/commands/post_bundle_message_spec.rb

@@ -18,7 +18,7 @@
   let(:bundle_show_path_message)   { "Bundled gems are installed into `#{bundle_path}`" }
   let(:bundle_complete_message)    { "Bundle complete!" }
   let(:bundle_updated_message)     { "Bundle updated!" }
-  let(:installed_gems_stats)       { "4 Gemfile dependencies, 5 gems now installed." }
+  let(:installed_gems_stats)       { "4 Gemfile dependencies, 4 gems now installed." }
 
   describe "when installing to system gems" do
     before do
@@ -44,14 +44,14 @@
       expect(out).to include(bundle_show_system_message)
       expect(out).to include("Gems in the groups 'emo' and 'test' were not installed")
       expect(out).to include(bundle_complete_message)
-      expect(out).to include("4 Gemfile dependencies, 3 gems now installed.")
+      expect(out).to include("4 Gemfile dependencies, 2 gems now installed.")
 
       bundle "config set --local without emo obama test"
       bundle :install
       expect(out).to include(bundle_show_system_message)
       expect(out).to include("Gems in the groups 'emo', 'obama' and 'test' were not installed")
       expect(out).to include(bundle_complete_message)
-      expect(out).to include("4 Gemfile dependencies, 2 gems now installed.")
+      expect(out).to include("4 Gemfile dependencies, 1 gem now installed.")
     end
 
     describe "for second bundle install run" do