was renamed to `ga_init` and the original `ga_init` is
  gone.
- "Old style" Vim tests (`src/testdir/*.in`) should be converted to Lua tests
  (see #1286 https://github.com/neovim/neovim/issues/1286 and #1328
  https://github.com/neovim/neovim/pull/1328). See Checklist for migrating
  legacy tests
  https://github.com/neovim/neovim/blob/master/test/README.md#checklist-for-migrating-legacy-tests.
    - However, please do not convert "new style" Vim tests
      (`src/testdir/*.vim`) to Lua. The "new style" Vim tests are faster than
      the old ones, and converting them takes time and effort better spent
      elsewhere. Just copy them to `test/old/testdir/*.vim`.
- Conditions that check `enc_utf8` or `has_mbyte` are obsolete (only the
  "true" case is applicable).
    - `enc_utf8` and `has_mbyte` macros were removed in
      https://github.com/neovim/neovim/pull/13293
- Check for `CSI` in typeahead buffer is only necessary in Vim with
  `FEAT_GUI`. `CSI` does not have a special meaning in typeahead buffer in
  Nvim. (also see https://github.com/neovim/neovim/pull/16936)

==============================================================================
LIST MANAGEMENT                              *dev-vimpatch-list-management*

Management of lists (types `list_T` and `listitem_T` from vim) was changed in
https://github.com/neovim/neovim/pull/7708/. There is a lint against the "old"
usage, but here are the most important changes.

Declarations for the table

- `list_T list`: a list
- `listitem_T li`: an item of `list`
- `int val` a value for `lv_copyID`

>
  --------------------------------------------------------------------------------------
  Old                             New                                  Comment
  ------------------------------- ------------------------------------------------------
  list->lv_first                  tv_list_first(list)
  list->lv_last                   tv_list_last(list)
  li->li_next                     TV_LIST_ITEM_NEXT(list, li)          To be avoided if possible, must use list which li belongs to.
  li->li_prev                     TV_LIST_ITEM_PREV(list, li)          To be avoided if possible, must use list which li belongs to.
                                  Suggestion by @ZyX-l:                Use TV_LIST_ITER or indexing instead of the previous two calls.
  list->lv_len                    tv_list_len(list)
  list->lv_lock                   tv_list_locked(list)
  &li->li_tv                      TV_LIST_ITEM_TV(li)
  list->lv_refcount++             tv_list_ref(list)
  val = list->lv_copyID           val = tv_list_copyid(list)
  list->lv_copyID = val           tv_list_set_copyid(list, val)

  for (li = list->lv_first;       TV_LIST_ITER_CONST(list, li,         Use TV_LIST_ITER(...) if you need to
  li != NULL && another_cond;     { if (another_cond) {break;} code})  modify list items (note: assigning copyID is also modification and this happens
  li = li->li_next) code                                               always when recursively traversing a list).

  --------------------------------------------------------------------------------------