Parse error - dar does not accept prune directories with trailing slash anymore

Hi!

;TLDR
=====
With v2.7.17 and later one can't use '-P cdrom/' anymore. Dar aborts
with the error message:
,---- [  ]
| Parse error: cdrom/ is an not a valid path: Empty string as subdirectory
| does not make a valid path
`----
The following works:
'-P cdrom'
or
'-P cdrom/*'

Bug or feature?



Long version
============

I have a couple of directories I wan't to have in the backup but without
the files.
I used for a long time for example '--empty-dir -P cdrom/' without
problems.

Now with v2.7.17 and v2.7.18 I only get en error message:
,---- [  ]
| Parse error: cdrom/ is an not a valid path: Empty string as subdirectory
| does not make a valid path
`----

What went wrong? The message does not enlighten me. I would say cdrom/
is a perfect path and is not empty either.

How to reproduce:
-----------------

export BASE=/tmp/dar_debug
mkdir -p ${BASE}/bak ${BASE}/files/cdrom
touch ${BASE}/files/file1 ${BASE}/files/cdrom/cdromfile1
dar --version
dar --create ${BASE}/bak/full_with_slash    --empty-dir --fs-root ${BASE}/files/ -P cdrom/
dar --create ${BASE}/bak/full_wo_slash      --empty-dir --fs-root ${BASE}/files/ -P cdrom
dar --create ${BASE}/bak/full_with_asterisk --empty-dir --fs-root ${BASE}/files/ -P cdrom/*


Results with v2.7.16
--------------------
All three create-commands are working as expected. They generate a
backup file including file1 and an empty cdrom directory.
cdromfile1 is not included as expected.

dar --list ${BASE}/bak/full_with_slash
[Data ][D][ EA  ][FSA][Compr][S]| Permission | User  | Group | Size    |          Date                 |    filename
--------------------------------+------------+-------+-------+---------+-------------------------------+------------
[Saved][ ]       [---][     ][ ]  -rw-rw-r--   1000	1000	0	Sun Jun  1 12:49:26 2025	file1
[Saved][-]       [---][     ][ ]  drwxrwxr-x   1000	1000	0	Sun Jun  1 12:49:26 2025	cdrom

dar --list ${BASE}/bak/full_wo_slash
[Data ][D][ EA  ][FSA][Compr][S]| Permission | User  | Group | Size    |          Date                 |    filename
--------------------------------+------------+-------+-------+---------+-------------------------------+------------
[Saved][ ]       [---][     ][ ]  -rw-rw-r--   1000	1000	0	Sun Jun  1 12:49:26 2025	file1
[Saved][-]       [---][     ][ ]  drwxrwxr-x   1000	1000	0	Sun Jun  1 12:49:26 2025	cdrom

dar --list ${BASE}/bak/full_with_asterisk
[Data ][D][ EA  ][FSA][Compr][S]| Permission | User  | Group | Size    |          Date                 |    filename
--------------------------------+------------+-------+-------+---------+-------------------------------+------------
[Saved][ ]       [---][     ][ ]  -rw-rw-r--   1000	1000	0	Sun Jun  1 12:49:26 2025	file1
[Saved][-]       [---][     ][ ]  drwxrwxr-x   1000	1000	0	Sun Jun  1 12:49:26 2025	cdrom


Results with v2.7.17 and v2.7.18
--------------------------------
The first create command failes with the error message above.
The second and third are working as expected.

dar --list ${BASE}/bak/full_with_slash
No backup file is present in file:///tmp/dar_debug/bak for archive full_with_slash, please provide the last file of the set. [return = YES | Esc = NO]

dar --list ${BASE}/bak/full_wo_slash
[Data ][D][ EA  ][FSA][Compr][S]| Permission | User  | Group | Size    |          Date                 |    filename
--------------------------------+------------+-------+-------+---------+-------------------------------+------------
[Saved][ ]       [---][     ][ ]  -rw-rw-r--   1000	1000	0	Sun Jun  1 12:49:26 2025	file1
[Saved][-]       [---][     ][ ]  drwxrwxr-x   1000	1000	0	Sun Jun  1 12:49:26 2025	cdrom

dar --list ${BASE}/bak/full_with_asterisk
[Data ][D][ EA  ][FSA][Compr][S]| Permission | User  | Group | Size    |          Date                 |    filename
--------------------------------+------------+-------+-------+---------+-------------------------------+------------
[Saved][ ]       [---][     ][ ]  -rw-rw-r--   1000	1000	0	Sun Jun  1 12:49:26 2025	file1
[Saved][-]       [---][     ][ ]  drwxrwxr-x   1000	1000	0	Sun Jun  1 12:49:26 2025	cdrom


Something between v2.7.16 and v2.7.17 has changed.
I would say this is a bug but it could be intentional. So my question
is:
Is it a bug or a feature?

Thanks for your support.
Tom