Passing symbol arguments to source (e.g. source :rubygems) is deprecated because they default to using HTTP requests. Instead, specify 'https://rubygems.org' if possible, or 'http://rubygems.org' if not.
Symbol arguments will be replaced with 'https://rubygems.org' when performing Autofix.
Existing sources that use http:// will not be replaced. This may be necessary where HTTPS is not available. For example, where using an internal gem server via an intranet, or where HTTPS is prohibited. However, you should strongly prefer https:// where possible, as it is more secure.
If you do not wish to switch from http:// in any case, consider setting
AllowHttpProtocol to false in your
.rubocop.yml. This option is true by default for safe autocorrection.
source :gemcutter source :rubygems source :rubyforge