Now with try_end() including more exception info, E5500 looks like
redundant information.
Adjust tests for more exception information.

Problem:    CmdlineChange event triggered twice for CTRL-R.
Solution:   Return CMDLINE_NOT_CHANGED from cmdline_insert_reg().
            (closes vim/vim#8219)

https://github.com/vim/vim/commit/796139ae3ac89e27ee96dce3c7fdb87d8c839f53

Cherry-pick Test_cmdline_map_cmdlineChanged() from patch 8.2.2851.

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Unlike split windows, creating a new floating window does not cause
other windows to resize, so it doesn't make much sense to trigger
WinScrolled or WinResized when creating a new floating window.

Problem:    WinScrolled is not triggered when filler lines change.
Solution:   Add "topfill" to the values that WinScrolled triggers on.
            (closes vim/vim#11668)

https://github.com/vim/vim/commit/3fc84dc2c7efecd7c14ce341cd777475058936fd

Cherry-pick StopVimInTerminal() from patch 9.0.1010.

Problem:    The WinScrolled autocommand event is not enough.
Solution:   Add WinResized and provide information about what changed.
            (closes vim/vim#11576)

https://github.com/vim/vim/commit/35fc61cb5b5eba8bbb9d8f0700332fbab38f40ca

Omit "func_name" comment in tv_dict_extend(): Vim9 script only.
Skip layout locking and E1312.
Skip list_alloc_with_items() and list_set_item().

Since this overrides remaining changes in patch 9.0.0913, that patch can
now be marked as fully ported:

vim-patch:9.0.0913: only change in current window triggers the WinScrolled event

N/A patches for version.c:

vim-patch:9.0.0919: build failure with tiny features

Problem:    Build failure with tiny features.
Solution:   Adjust #ifdef's.

https://github.com/vim/vim/commit/9c5b7cb4cf67c64648a324e9dfd1e17d793335a4

Co-authored-by: Bram Moolenaar <Bram@vim.org>

Extend the capabilities of is_os to detect more platforms such as
freebsd and openbsd. Also remove `iswin()` helper function as it can be
replaced by `is_os("win")`.