BL template failure

gistfile1.txt

halfsour:dpla mark$ rails new search_app -m https://raw.github.com/projectblacklight/blacklight/master/template.demo.rb
      create
      create  README.rdoc
      create  Rakefile
      create  config.ru
      create  .gitignore
      create  Gemfile
      create  app
      create  app/assets/javascripts/application.js
      create  app/assets/stylesheets/application.css
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb
      create  app/views/layouts/application.html.erb
      create  app/assets/images/.keep
      create  app/mailers/.keep
      create  app/models/.keep
      create  app/controllers/concerns/.keep
      create  app/models/concerns/.keep
      create  bin
      create  bin/bundle
      create  bin/rails
      create  bin/rake
      create  bin/setup
      create  config
      create  config/routes.rb
      create  config/application.rb
      create  config/environment.rb
      create  config/secrets.yml
      create  config/environments
      create  config/environments/development.rb
      create  config/environments/production.rb
      create  config/environments/test.rb
      create  config/initializers
      create  config/initializers/assets.rb
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/cookies_serializer.rb
      create  config/initializers/filter_parameter_logging.rb
      create  config/initializers/inflections.rb
      create  config/initializers/mime_types.rb
      create  config/initializers/session_store.rb
      create  config/initializers/wrap_parameters.rb
      create  config/locales
      create  config/locales/en.yml
      create  config/boot.rb
      create  config/database.yml
      create  db
      create  db/seeds.rb
      create  lib
      create  lib/tasks
      create  lib/tasks/.keep
      create  lib/assets
      create  lib/assets/.keep
      create  log
      create  log/.keep
      create  public
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/favicon.ico
      create  public/robots.txt
      create  test/fixtures
      create  test/fixtures/.keep
      create  test/controllers
      create  test/controllers/.keep
      create  test/mailers
      create  test/mailers/.keep
      create  test/models
      create  test/models/.keep
      create  test/helpers
      create  test/helpers/.keep
      create  test/integration
      create  test/integration/.keep
      create  test/test_helper.rb
      create  tmp/cache
      create  tmp/cache/assets
      create  vendor/assets/javascripts
      create  vendor/assets/javascripts/.keep
      create  vendor/assets/stylesheets
      create  vendor/assets/stylesheets/.keep
       apply  https://raw.github.com/projectblacklight/blacklight/master/template.demo.rb
/Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/generators/actions.rb:26:in `gem': can't modify frozen String (RuntimeError)
	from https://raw.github.com/projectblacklight/blacklight/master/template.demo.rb:2:in `apply'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions.rb:223:in `instance_eval'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions.rb:223:in `apply'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/generators/app_base.rb:143:in `apply_rails_template'
	from (eval):1:in `apply_rails_template'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `map'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/application.rb:17:in `<top (required)>'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/cli.rb:14:in `<top (required)>'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Users/mark/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/bin/rails:9:in `<top (required)>'
	from /Users/mark/.rbenv/versions/2.3.0/bin/rails:23:in `load'
	from /Users/mark/.rbenv/versions/2.3.0/bin/rails:23:in `<main>'