"`[v`]",
	      \ block: "`[\<C-V>`]",
	      \ }[a:type]
	    let [_, _, col, off] = getpos("']")
	    if off != 0
	      let vcol = getline("'[")->strpart(0, col + off)->strdisplaywidth()
	      if vcol >= [line("'["), '$']->virtcol() - 1
	        let a:context.extend_block = '$'
	      else
	        let a:context.extend_block = vcol .. '|'
	      endif
	    endif
	    if a:context.extend_block != ''
	      let commands ..= 'oO' .. a:context.extend_block
	    endif
	    let commands ..= 'y'
	    execute 'silent noautocmd keepjumps normal! ' .. commands
	    echomsg getreg('"')->count(' ')
	  finally
	    call setreg('"', save.register)
	    call setpos("'<", save.visual_marks[0])
	    call setpos("'>", save.visual_marks[1])
	    let &clipboard = save.clipboard
	    let &selection = save.selection
	    let [&l:virtualedit, &g:virtualedit] = get(a:context.dot_command ? save : a:context, 'virtualedit')
	    let a:context.dot_command = v:true
	  endtry
	endfunction

An <expr> mapping is used to be able to fetch any prefixed count and register.
This also avoids using a command line, which would trigger CmdlineEnter and
CmdlineLeave autocommands.

Note that the 'selection' option is temporarily set to "inclusive" to be able
to yank exactly the right text by using Visual mode from the '[ to the ']
mark.

Also note that the 'clipboard' option is temporarily emptied to avoid
clobbering the `"*` or `"+` registers, if its value contains the item `unnamed`
or `unnamedplus`.

The `mode()` function will return the state as it will be after applying the
operator.

Here is an example for using a lambda function to create a normal-mode
operator to add quotes around text in the current line: >

	nnoremap <F4> <Cmd>let &opfunc='{t ->
				\ getline(".")
				\ ->split("\\zs")
				\ ->insert("\"", col("'']"))
				\ ->insert("\"", col("''[") - 1)
				\ ->join("")
				\ ->setline(".")}'<CR>g@

==============================================================================
2. Abbreviations		*abbreviation* *abbreviations* *Abbreviations*

Abbreviations are used in Insert mode, Replace mode and Command-line mode.
If you enter a word that is an abbreviation, it is replaced with the word it
stands for.  This can be used to save typing for often used long words.  And
you can use it to automatically correct obvious spelling errors.
Examples:

	:iab ms Microsoft
	:iab tihs this

There are three types of abbreviations:

full-id	  The "full-id" type consists entirely of keyword characters (letters
	  and characters from 'iskeyword' option).  This is the most common
	  abbreviation.

	  Examples: "foo", "g3", "-1"

end-id	  The "end-id" type ends in a keyword character, but all the other
	  characters are not keyword characters.

	  Examples: "#i", "..f", "$/7"

non-id	  The "non-id" type ends in a non-keyword character, the other
	  characters may be of any type, excluding space and tab.

	  Examples: "def#", "4/7$"

Examples of strings that cannot be abbreviations: "a.b", "#def", "a b", "_$r"

An abbreviation is only recognized when you type a non-keyword character.
This can also be the <Esc> that ends Insert mode or the <CR> that ends a
command.  The non-keyword character which ends the abbreviation is inserted
after the expanded abbreviation.  An exception to this is the character <C-]>,
which is used to expand an abbreviation without inserting any extra
characters.

Example: >
   :ab hh	hello
<	    "hh<Space>" is expanded to "hello<Space>"
	    "hh<C-]>" is expanded to "hello"

The characters before the cursor must match the abbreviation.  Each type has
an additional rule:

full-id	  In front of the match is a non-keyword character, or this is where
	  the line or insertion starts.  Exception: When the abbreviation is
	  only one character, it is not recognized if there is a non-keyword
	  character in front of it, other than a space or a tab. However, for
	  the command line "'<,'>" (or any other marks) is ignored, as if the
	  command line starts after