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                                     BUNDLE
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Generate a Gemfile in the current directory
$ bunlde init

Add a new gem to the bundle
$ bundle add <gem_name>
--group=GROUP: Specify the group (production, development, ...)
--require=false: Specify that the gem is unrequired (Not loaded each time)

List installed gems with newer verisons available
$ bundle outdated

Update a gem
$ bundle update <gem_name>

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