Exclude cursor when doing ctrl-w

[pickfire]

Currently ctrl-w in insert mode deletes the cursor which results in
unexpected behavior. The patch also reduces the selection to cursor before
performing prev word to remove the behavior of removing unnecessary text
when nothing should be removed.

1. ::#(|)#:: after ctrl-w should be #(|)#::, previously #(|)#:
2. #(|::)# after ctrl-w should be #(|::)#, previously #(|)#

Fix #2390

cc @scgtrp thanks for reporting the issue

Would be good if @cessen can review, I wonder if there is a better solution for this

[EricCrosson]

Thank you @pickfire !! I have noticed this but had not gotten around to the fix

🚀 🚀 🚀

[pickfire]

I just realized there is a bug on this, first insert

hello

Then go to EOF (spam j), and delete one character (newline) backward, then ctrl-w, o still remains.

[EricCrosson]

Hmm, I can't reproduce that

I'm on

; hx --version
helix 22.05-dev (7b287f63

When I insert

hello

then spam j, delete one character backward (with backspace), then press Ctrl-w, I only have a newline remaining in the buffer

[scgtrp]

I can reproduce it, but I think I see why you can't: @pickfire and I are doing
hello\n
delete one character:
hello
ctrl-W:
o

but it sounds like you're doing:
hello\n
delete one character:
hell\n
ctrl-W:
\n

[pickfire]

@scgtrp Thanks for making it more accurate, I forgot to say delete one newline character using backspace on insert mode. Oh, seemed like if the newline was deleted from normal mode and insert mode both have the same result.

1. insert hello\n
2. j
3. insert <backspace><ctrl-w> (or d then insert ctrl-w)