Watch rake files in default Guardfile

Author: agrberg

lib/guard/rspec/templates/Guardfile

@@ -50,4 +50,7 @@ guard :rspec, cmd: "bundle exec rspec" do
   watch(%r{^spec/acceptance/steps/(.+)_steps\.rb$}) do |m|
     Dir[File.join("**/#{m[1]}.feature")][0] || "spec/acceptance"
   end
+
+  # Rake tasks
+  dsl.watch_spec_files_for(dsl.rake.rake_files)
 end