test(ALL): fix blockwise mode tests after Nightly changes

[abeldekat]

• I have read CONTRIBUTING.md
• I have read CODE_OF_CONDUCT.md

Details:

• See PR 42321 in neovim/neovim

That PR also breaks a test in mini.align: "Align with preview | works | test + args { "Normal-block" }"

I don't know if the fix needs to be in align, or in test_align. New output:

  --|---------|---------|---------|
  01|  a-_-b-_-c                   
  02|aaa-_-bbb_ccc                 

The old output also aligns on the underscore before the c character:

  --|---------|---------|---------|
  01|  a-_-b-_c                    
  02|aaa-_bbb_ccc                  

I manually replayed that test with version 0.12.6, and was surprised to see that I could not reproduce the old alignment from the screenshot. The result is always according to the new output...

[echasnovski]

I am not quite sure, but it feels like something got subtly broken in after that PR. In a sense that the new behavior is not something that matches the documentation.

As per the test adjustment, I'd rather adjust the position of the target mark instead of the resulting lines. With short comment about why it has to be different on Neovim<0.13 and Neovim>=0.13.

In test_surround.lua it is for where a mark is done: set_cursor(2, child.fn.has('nvim-0.13') == 1 and 2 or 3).

In test_align.lua (which seems to have the same cause of not the expected) it is through different mark, as mark a is
used for other parameters: child.fn.setpos("'b", { 0, 2, 4, 0 }).

I manually replayed that test with version 0.12.6, and was surprised to see that I could not reproduce the old alignment from the screenshot. The result is always according to the new output...

I can reproduce it in 0.12.6 as described in the test, so there is okay.

[echasnovski]

Thanks, looks good now!