Remove Rubygems deprecation warnings
Rubygems can produce lots of deprecation warnings, but sometimes, you cannot fix them. To have a tidy terminal with output that matters, add this to the top of your Gemfile and enjoy silence:
Deprecate.skip = true if defined?(Deprecate.skip)
Gem::Deprecate.skip = true if defined?(Gem::Deprecate.skip)
# all gems go here ...
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