我刚刚创建了一个名为maker的示例gem。我也在使用RVM。
最近添加示例用户功能的更改出现在this PR中。我一直在Bundler文档中遵循this guide来创建一个新的gem。
我目前正在尝试通过irb使用gem，当我执行require maker时，我得到以下错误：

:001 > require 'maker'
LoadError: cannot load such file -- maker/user
    from /Users/mohnishgj/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/mohnishgj/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/mohnishgj/.rvm/gems/ruby-2.4.1@experiments/gems/maker-0.1.0/lib/maker.rb:2:in `<top (required)>'
    from /Users/mohnishgj/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:133:in `require'
    from /Users/mohnishgj/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:133:in `rescue in require'
    from /Users/mohnishgj/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:40:in `require'
    from (irb):1
    from /Users/mohnishgj/.rvm/rubies/ruby-2.4.1/bin/irb:11:in `<main>'
 :002 >

当我导航到experiments gem集（即/Users/mohnishgj/.rvm/gems/ruby-2.4.1@experiments/gems/maker-0.1.0）安装gem的位置时，我清楚地看到该位置缺少user.rb文件。

/Users/mohnishgj/.rvm/gems/ruby-2.4.1@experiments/gems/maker-0.1.0/lib/maker
➜  maker ls
version.rb

每当我想添加新文件作为gem的一部分并希望它在irb之外工作时，我该如何解决这个问题呢？我是否做了一些与宝石相关的开发错误？请原谅我的无知，我是一个相对较新的创造宝石。我应该如何正确地从源代码进行gem相关的开发？
此外，我可能会错过一些东西，但当我尝试添加Bundler.require(:default, :development)到maker.gemspec（如guide to create the gem中所建议的）时，

lib = File.expand_path("../lib", __FILE__)
$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
require "maker/version"
Bundler.require(:default, :development)

我得到了如下错误：

[!] There was an error parsing `Gemfile`:  - [!] There was an error while loading `maker.gemspec`:  - [!] There was an error parsing `Gemfile`:  - [!] There was an error while loading `maker.gemspec`:  - [!] There was an error parsing `Gemfile`:

我能错过什么呢？