# File lib/albino.rb, line 120
  def validate_shell_args(flag, value)
    if flag !~ /^[a-z]+$/i
      raise ShellArgumentError, "Flag is invalid: #{flag.inspect}"
    end
    if value !~ /^[a-z0-9\-\_\+\=\#\,\s]+$/i
      raise ShellArgumentError, "Flag value is invalid: -#{flag} #{value.inspect}"
    end
  end