Inline Bundler and autorun RSpec

bundler-rspec-inline.rb

require "bundler/inline"

gemfile do
  gem "rspec"
end

require "rspec/autorun"

RSpec.describe "inline Bundler and autorun RSpec" do
  it "is convenient for self-contained examples & bug repros" do
    expect(true).to be true
  end
end

# can be run directly: 
# ruby <file.rb>