fix GemNotFound message in Resolver

lib/bundler/index.rb

@@ -81,10 +81,6 @@ def local_search(query, base = nil)
       end
     end
 
-    def source_types
-      sources.map{|s| s.class }.uniq
-    end
-
     alias [] search
 
     def <<(spec)

lib/bundler/resolver.rb

@@ -324,8 +324,8 @@ def verify_gemfile_dependencies_are_found!(requirements)
             end
           else
             message = "Could not find gem '#{requirement}' "
-            if @index.source_types.include?(Bundler::Source::Rubygems)
-              message << "in any of the gem sources listed in your Gemfile."
+            if Bundler.definition.has_rubygems_remotes?
+              message << "in any of the gem sources listed in your Gemfile or installed on this machine."
             else
               message << "in the gems available on this machine."
             end

spec/install/post_bundle_message_spec.rb

@@ -81,6 +81,22 @@
         expect(out).to include(bundle_complete_message)
       end
     end
+
+    describe "with misspelled or non-existent gem name" do
+      before :each do
+        gemfile <<-G
+          source 'https://rubygems.org/'
+          gem "rails"
+          gem "misspelled-gem-name", :group => :development
+        G
+      end
+
+      it "should report a helpufl error message" do
+        bundle :install
+        expect(out).to include("Fetching gem metadata from https://rubygems.org/")
+        expect(out).to include("Could not find gem 'misspelled-gem-name (>= 0) ruby' in any of the gem sources listed in your Gemfile or installed on this machine.")
+      end
+    end
   end
 
   describe "for second bundle install run" do