EOL edge case handled for `dw` needs to be handled for all other operators

[tuurep]

Important: I fixed this bug as a byproduct of trying to fix some cw edge cases in
#69, just wanted to open an issue to link to when I send a PR

For d, there's handling for this case:

    foo
      ^
    bar

dw

becomes:

    fo
     ^
    bar

and not:

    fo
bar
^

Handling:

vim-wordmotion/autoload/wordmotion.vim

Lines 127 to 141 in 81d9bd2

	" dw at the end of a line should not consume the newline or leading white
	" space on the next line
	let l:is_dw = a:mode == 'o' && v:operator == 'd' && l:flags == ''
	let l:next_line = l:pos[1] < getpos('.')[1]
	if l:is_dw && l:next_line
	let l:s = a:uppercase ? s:us : s:s
	" newline, leading whitespace, cursor
	if search('\m\n\%('.l:s.'\)*\%#', 'bW') != 0
	let l:dwpos = getpos('.')
	" need to make range inclusive
	call setpos('.', l:pos)
	normal! v
	call setpos('.', l:dwpos)
	endif
	endif

Bug: this needs to be handled for every operator, with the most obvious example being y

    foo
      ^
    bar

ywp

Expected:

    fooo
       ^
    bar

Got:

    fooo
       ^
(4 leading whitespace)
    bar

With mini.surround

    foo
      ^
    bar

saw)

Expected:

    fo(o)
       ^
    bar

Got:

    fo(o
       ^
    )bar

It looks safe to say that every operator should be included in the handling of this edge
case, it's just that cw has its slight differences, but that doesn't matter for this.