You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: synergy-core.rb
    path of file: ./repos/homebrew-core/Formula/s
    
    the code of the file until where you have to start completion: class SynergyCore < Formula
  desc "Synergy, the keyboard and mouse sharing tool"
  homepage "https://symless.com/synergy"
  url "h
    
  def caveats
    # Because we used `license :cannot_represent` above, tell the user how to
    # read the license.
    s = <<~EOS
      Read the synergy-core license here:
        #{opt_prefix}/LICENSE
    EOS
    # The binaries built by brew are not signed by a trusted certificate, so the
    # user may need to revoke all permissions for 'Accessibility' and re-grant
    # them when upgrading synergy-core.
    on_macos do
      s += "\n" + <<~EOS
        Synergy requires the 'Accessibility' permission.
        You can grant this permission by navigating to:
          System Preferences -> Security & Privacy -> Privacy -> Accessibility

        If Synergy still doesn't work, try clearing the 'Accessibility' list:
          sudo tccutil reset Accessibility
        You can then grant the 'Accessibility' permission again.
        You may need to clear this list each time you upgrade synergy-core.
      EOS
    end
    s
  end

  test do
    assert_equal shell_output("#{opt_bin}/synergys", 4),
                 "synergys: no configuration available\n"
    assert_equal shell_output("#{opt_bin}/synergyc", 3).split("\n")[0],
                 "synergyc: a server address or name is required"
    return if head?

    version_string = Regexp.quote(version.major_minor_patch)
    assert_match(/synergys #{version_string}[-.0-9a-z]*, protocol version/,
                 shell_output("#{opt_bin}/synergys --version", 3).lines.first)
    assert_match(/synergyc #{version_string}[-.0-9a-z]*, protocol version/,
                 shell_output("#{opt_bin}/synergyc --version", 3).lines.first)
  end
end