scripts: replace/extend -- with --end-of-options in git commands

[vszakats]

It makes these scripts require Git 2.24.0+ (2019-11-04).

Refs:
https://git-scm.com/docs/gitcli
https://nesbitt.io/2026/07/21/end-of-options.html
git/git@19e8789

[Copilot]

Pull request overview

This PR updates several Perl/scripts that invoke Git commands, replacing -- with --end-of-options to explicitly terminate option parsing and thereby require Git 2.24.0+.

Changes:

• Replaced -- with --end-of-options in various git ls-files, git status, git rev-list, and git grep invocations.
• Standardized option-termination handling across test and maintenance scripts.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/test1275.pl	Uses --end-of-options for git ls-files pathspec handling.
scripts/singleuse.pl	Updates git grep invocation (currently introduces an argument-order/semantics problem).
scripts/delta	Updates git grep invocation (currently introduces a rev/path separator problem).
scripts/checksrc.pl	Updates git status and git rev-list invocations (rev-list change currently breaks path-limiting semantics).
scripts/badwords	Uses --end-of-options for git ls-files pathspec handling.
.github/scripts/cleancmd.pl	Uses --end-of-options for git ls-files pathspec handling.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (2)

scripts/delta:134

• git grep treats extra arguments after the pattern as revisions unless -- is used to start the pathspec list. Dropping the -- here changes behavior if a ref named include/curl exists (it would grep that revision instead of the include/curl path). Keep the explicit -- to preserve the original, unambiguous pathspec parsing.

my $apublic = cmd('git', 'grep', '--end-of-options', '^CURL_EXTERN', 'include/curl');

scripts/singleuse.pl:170

• This previously used -- after the pattern to force the following arguments to be treated as pathspecs (not revisions) by git grep. With only --end-of-options here, a ref named lib/projects/etc could be interpreted as a revision, changing what gets searched. Add back the -- delimiter after $f to keep the original unambiguous behavior.

    open(F, '-|', 'git', 'grep', '-Fwle', '--end-of-options', $f, 'lib', @unittests, 'projects');

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.