error running camp validate

[HoffmannP]

entry.yaml:

component: component_name
labels: ["fully-free"]
security-contact: empty
source: https://git.uni-jena.de/rz/mmz/moodle/plugins/component_name
maintainers:
- github: B-Ranger
tier: 1
status: active
discovered: '2026-08-05'
releases: []
summary: component_name test plugin
license: GPL-3.0

$: camp validate entry.yaml
camp validate entry.yaml
Traceback (most recent call last):
  File "/home/ber/Projekte/CAMP/.venv/bin/camp", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/ber/Projekte/CAMP/.venv/lib/python3.12/site-packages/camp/cli.py", line 646, in main
    return args.func(args)
           ^^^^^^^^^^^^^^^
  File "/home/ber/Projekte/CAMP/.venv/lib/python3.12/site-packages/camp/cli.py", line 34, in _cmd_validate
    problems = validate_entry(path)
               ^^^^^^^^^^^^^^^^^^^^
  File "/home/ber/Projekte/CAMP/.venv/lib/python3.12/site-packages/camp/validate.py", line 53, invalidate_entry
    f"file is at {actual.name} under '{actual.parts[-2]}/' but component "
                                       ~~~~~~~~~~~~^^^^
IndexError: tuple index out of range
``

[HoffmannP]

Probably it should be:

            f"file is at {actual.name} under '{Path(*actual.parts[:-2])}/' but component "
# instead of
            f"file is at {actual.name} under '{actual.parts[-2]}/' but component "

[BerengarWLehr]

Fix: #38