show_command_help

# File lib/rubygems/commands/help_command.rb, line 359
  def show_command_help command_name # :nodoc:
    command_name = command_name.downcase

    possibilities = @command_manager.find_command_possibilities command_name

    if possibilities.size == 1 then
      command = @command_manager[possibilities.first]
      command.invoke("--help")
    elsif possibilities.size > 1 then
      alert_warning "Ambiguous command #{command_name} (#{possibilities.join(', ')})"
    else
      alert_warning "Unknown command #{command_name}.  Try: gem help commands"
    end
  end