From: Kristofer Karlsson <krka@spotify.com>

Since dd4bc01c0a (revision: use priority queue for non-limited
streaming walks, 2026-05-27), "git rev-list --no-walk <commit>
-- <path>" ignores the path arguments and outputs all commits
regardless of whether they touch the given paths.

That commit introduced a REV_WALK_NO_WALK enum value to separate
--no-walk from the streaming walk in get_revision_1(). The new
case skips process_parents(), which is correct for not enqueuing
parents, but also skips try_to_simplify_commit() which
process_parents() calls to evaluate whether each commit touches
the given paths.

Add a call to try_to_simplify_commit() for the
REV_WALK_NO_WALK case, folding it into the existing
REV_WALK_REFLOG case which already does the same.

Add tests for --no-walk path filtering to t6017. The
"single commit, match" test is defensive and passes without
the fix, while the other two fail without it.

Reported-by: Peter Colberg <pcolberg@redhat.com>
Signed-off-by: Kristofer Karlsson <krka@spotify.com>

Submitted-As: https://lore.kernel.org/git/pull.2181.git.1784198879711.gitgitgadget@gmail.com