Merge Bundler 2.0.1 from upstream.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66710 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 22 insertions, 6 deletions

diff --git a/lib/bundler/spec_set.rb b/lib/bundler/spec_set.rb
index 5003b2cbec..bbdf04a7d6 100644
--- a/lib/bundler/spec_set.rb
+++ b/lib/bundler/spec_set.rb
@@ -1,16 +1,12 @@
 # frozen_string_literal: true
 
 require "tsort"
-require "forwardable"
 require "set"
 
 module Bundler
   class SpecSet
-    extend Forwardable
-    include TSort, Enumerable
-
-    def_delegators :@specs, :<<, :length, :add, :remove, :size, :empty?
-    def_delegators :sorted, :each
+    include Enumerable
+    include TSort
 
     def initialize(specs)
       @specs = specs
@@ -132,6 +128,26 @@ module Bundler
       what_required(req) << spec
     end
 
+    def <<(spec)
+      @specs << spec
+    end
+
+    def length
+      @specs.length
+    end
+
+    def size
+      @specs.size
+    end
+
+    def empty?
+      @specs.empty?
+    end
+
+    def each(&b)
+      sorted.each(&b)
+    end
+
   private
 
     def sorted