[rubygems/rubygems] Bundler: make to_lock consistent between Gem::Dependency and Bundler::Dependency

https://github.com/rubygems/rubygems/commit/971d57cf5a

lib/bundler/dependency.rb

@@ -151,7 +151,7 @@ module Bundler
     def to_lock
       out = super
       out << "!" if source
-      out << "\n"
+      out
     end
 
     def specific?

lib/bundler/lockfile_generator.rb

@@ -60,7 +60,7 @@ module Bundler
       handled = []
       definition.dependencies.sort_by(&:to_s).each do |dep|
         next if handled.include?(dep.name)
-        out << dep.to_lock
+        out << dep.to_lock << "\n"
         handled << dep.name
       end
     end

spec/bundler/bundler/dependency_spec.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+RSpec.describe Bundler::Dependency do
+  let(:options) do
+    {}
+  end
+  let(:dependency) do
+    described_class.new(
+      "test_gem",
+      "1.0.0",
+      options
+    )
+  end
+
+  describe "to_lock" do
+    it "returns formatted string" do
+      expect(dependency.to_lock).to eq("  test_gem (= 1.0.0)")
+    end
+
+    it "matches format of Gem::Dependency#to_lock" do
+      gem_dependency = Gem::Dependency.new("test_gem", "1.0.0")
+      expect(dependency.to_lock).to eq(gem_dependency.to_lock)
+    end
+
+    context "when source is passed" do
+      let(:options) do
+        {
+          "source" => Bundler::Source::Git.new({}),
+        }
+      end
+
+      it "returns formatted string with exclamation mark" do
+        expect(dependency.to_lock).to eq("  test_gem (= 1.0.0)!")
+      end
+    end
+  end
+end