warn_ambiguous_gems

# File lib/bundler/cli/install.rb, line 204
    def warn_ambiguous_gems
      Installer.ambiguous_gems.to_a.each do |name, installed_from_uri, *also_found_in_uris|
        Bundler.ui.error "Warning: the gem '#{name}' was found in multiple sources."
        Bundler.ui.error "Installed from: #{installed_from_uri}"
        Bundler.ui.error "Also found in:"
        also_found_in_uris.each {|uri| Bundler.ui.error "  * #{uri}" }
        Bundler.ui.error "You should add a source requirement to restrict this gem to your preferred source."
        Bundler.ui.error "For example:"
        Bundler.ui.error "    gem '#{name}', :source => '#{installed_from_uri}'"
        Bundler.ui.error "Then uninstall the gem '#{name}' (or delete all bundled gems) and then install again."
      end
    end