fix(extmark): adjust invalidate range by one for deleted lines #37897

Problem:  A multi-line extmark that ends exactly at a deleted range end
          is not invalidated.
          Revalidated sign mark is added with incorrect range.
Solution: Remove questionable invalidation range condition which was
          originally added to avoid deleting a mark that ends below a
          deleted line.

          Since splicing for a deleted line, and a replaced range that
          explicitly ends at column 0 beyond a deleted line is identical,
          we can't try to distinguish these two cases. I.e. :1delete 1
          and nvim_buf_set_text(0, 0, 0, 1, 0, {}) yield the same splice
          operation.

          This means that a multi-line sign_text mark should now span at
          least one column beyond its end_row, as seen in the adjusted
          test. This is still somewhat unexpected/inconvenient to me
          which is what prompted me to try to avoid it with the original
          condition.

          Add revalidated sign mark back to decor with correct range;
          third sign mark added to test exposed a crash.

0 files changed, 0 insertions, 0 deletions