new

# File lib/rubygems/errors.rb, line 37
    def initialize target, conflicts
      @target    = target
      @conflicts = conflicts
      @name      = target.name

      reason = conflicts.map { |act, dependencies|
        "#{act.full_name} conflicts with #{dependencies.join(", ")}"
      }.join ", "

      # TODO: improve message by saying who activated `con`

      super("Unable to activate #{target.full_name}, because #{reason}")
    end