anchor.diff:  
   NOTE: The `rubocop` command is executed using server process if server is started.
   Whenever server process is not running, it will load the RuboCop runtime files and execute.
  -(same behavior as 1.30 and lower)
  +(same behavior as with RuboCop 1.30 and lower)
   
  -If server is already running, just display the PID. The new server will not start.
  +If server is already running, the command only displays the server PID. A new server will not be started.
   
   ```console
   % rubocop --start-server
   RuboCop server (16060) is already running.
   ```
   
  -A started server process name is `rubocop --server` with project directory path.
  +The server process name is basically `rubocop --server` and the project directory path:
   
   ```console
   % ps aux | grep 'rubocop --server'
  
positive.code: = Server Mode
  
  You can reduce the RuboCop boot time by using the `--server` option.
  
  The server option speeds up the launch of the `rubocop` command by serverizing
  the process that loaded the RuboCop runtime production files (i.e. `require 'rubocop'`).
  
  NOTE: The feature cannot be used on JRuby and Windows that do not support fork.
  
  == Run with Server
  
  There are two ways to enable server.
  
  - `rubocop --server` ... If server process has not started yet,
  start server process and execute inspection with server.
  - `rubocop --start-server` ... Just start server process.
  
  When server is started, it outputs the host and port.
  
  ```console
  % rubocop --start-server
  
negative.code: RuboCop server starting on 127.0.0.1:55822.
  ```
  
  == Command Line Options
  
  These are the command-line options for server operations:
  
  * `--server` ... If a server process has not been started yet, start the
  server process and execute inspection with server. You can specify
  the server host and port with the `$RUBOCOP_SERVER_HOST` and
  the `$RUBOCOP_SERVER_PORT` environment variables.
  * `--no-server` ... If a server process has been started, stop the
  server process and execute inspection without the server.
  * `--restart-server` ... Restart server process.
  * `--start-server` ... Start server process.
  * `--stop-server` ... Stop server process.
  