Expose Adapter#mention_format to Robot. Closes litaio#104.

lib/lita/robot.rb

@@ -36,6 +36,11 @@ class Robot
 
     def_delegators :registry, :config, :adapters, :handlers, :hooks
 
+    # @!method mention_format(name)
+    #   @see Lita::Adapter#mention_format
+    #   @since 4.4.0
+    def_delegators :adapter, :mention_format
+
     # @param registry [Lita::Registry] The registry for the robot's configuration and plugins.
     def initialize(registry = Lita)
       @registry = registry

spec/lita/robot_spec.rb

@@ -22,6 +22,10 @@
     expect(subject.mention_name).to eq("wongo")
   end
 
+  it "exposes Adapter#mention_format" do
+    expect(subject.mention_format(subject.mention_name)).to eq("Lita:")
+  end
+
   context "with registered handlers" do
     let(:handler1) { Class.new(Lita::Handler) { namespace :test } }
     let(:handler2) { Class.new(Lita::Handler) { namespace :test } }