perltidy Files

## Changes from version 20250105 to version 20250214

    - A new option --keep-old-blank-lines-exceptions=s, or --kblx=s,
      allows selected blank lines to be ignored when an input stream
      is read. The parameter s is used to select the blank lines to
      be ignored. This option provides an inverse to other blank line
      parameters. The manual has details. See discussion git #180.

    - A new option --warn-unused-keys, or -wuk, has been added which will
      produce warnings for unused hash keys during formatting. This is similar
      to --dump-unused-keys, which just exits and does not continue formatting.
      A related new parameter --warn-unused-keys-cutoff=N provides control
      over a filter which prevents warnings for keys which appear to be
      members of large hashes used to communicate with external packages.
      The manual has details.  See also git #177.

    - A new option --pack-opening-types='->' has been added to provide more
      control over breaks of method call chains.  It tells perltidy not to
      break at every method call when a chain of calls spans multiple lines.
      This was the behavior in versions prior to 20250105. The default
      starting with 20250105 is to break at each call of a method call chain
      which spans multiple lines. The manual has details. See also git #171.