suggest_gems_from_name

# File lib/rubygems/spec_fetcher.rb, line 187
  def suggest_gems_from_name(gem_name, type = :latest)
    gem_name        = gem_name.downcase.tr('_-', '')
    max             = gem_name.size / 2
    names           = available_specs(type).first.values.flatten(1)

    matches = names.map { |n|
      next unless n.match_platform?

      distance = levenshtein_distance gem_name, n.name.downcase.tr('_-', '')

      next if distance >= max

      return [n.name] if distance == 0

      [n.name, distance]
    }.compact

    matches = if matches.empty? && type != :prerelease
      suggest_gems_from_name gem_name, :prerelease
    else
      matches.uniq.sort_by { |name, dist| dist }
    end

    matches.first(5).map { |name, dist| name }
  end