Problem:  No test for mode() when executing Ex commands
Solution: Add some test cases and simplify several other test cases.
          Also add a few more test cases for ModeChanged.

closes: vim/vim#13588

https://github.com/vim/vim/commit/fcaeb3d42b228e73c669b2fce78f1d3fe112769f

Problem:  Cannot detect overstrike mode in Cmdline mode
Solution: Make mode() return "cr" for overstrike

closes: vim/vim#13569

https://github.com/vim/vim/commit/d1c3ef1f47c87d1da056c56564e1985fe6f2931d

runtime(doc): Fix whitespace and formatting of some help files (vim/vim#13549)

https://github.com/vim/vim/commit/596a9f29c83af85ace1a2702c88591851ad14df8

N/A patch:
vim-patch:aabca259fa48

Co-authored-by: h_east <h.east.727@gmail.com>

Problem:    Not easy to filter the output of maplist().
Solution:   Add mode_bits to the dictionary. (Ernie Rael, closes vim/vim#10356)

https://github.com/vim/vim/commit/d8f5f766219273a8579947cc80b92580b6988a4b

Co-authored-by: Ernie Rael <errael@raelity.com>

Problem:    It is not easy to restore saved mappings.
Solution:   Make mapset() accept a dict argument. (Ernie Rael, closes vim/vim#10295)

https://github.com/vim/vim/commit/51d04d16f21e19d6eded98f9530d84089102f925

Co-authored-by: Ernie Rael <errael@raelity.com>

Problem:    Can only get a list of mappings.
Solution:   Add the optional {abbr} argument. (Ernie Rael, closes vim/vim#10277)
            Rename to maplist().  Rename test file.

https://github.com/vim/vim/commit/09661203ecefbee6a6f09438afcff1843e9dbfb4

Co-authored-by: Ernie Rael <errael@raelity.com>

Problem:    Not simple programmatic way to find a specific mapping.
Solution:   Add getmappings(). (Ernie Rael, closes vim/vim#10273)

https://github.com/vim/vim/commit/659c240cf769925ff432b88df8719e7ace4629b0

Co-authored-by: Ernie Rael <errael@raelity.com>

Problem:    maparg() does not indicate the type of script where it was defined.
Solution:   Add "scriptversion".

https://github.com/vim/vim/commit/a9528b39a666dbaa026320f73bae4b1628a7fe51

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

Co-authored-by: tmummert <doczook@gmx.de>
Co-authored-by: parikshit adhikari <parikshitadhikari@gmail.com>