Fix ConfirmBehavior.Replace

[keithpl]

This reverts breaking change in 27bc575.

Before this change confirm() with ConfirmBehavior.Replace behaved as expected:

abcd|<C-n><CR> abcdefg|

Presently confirm() with ConfirmBehavior.Replace is inserting the entire suggestion after the cursor:

abcd|<C-n><CR> abcdabcdefg|

[keithpl]

This is the current behavior: https://user-images.githubusercontent.com/682595/186026832-f817c995-02a3-4735-bfc2-93f7ed9c61ef.mp4

This is after reverting: https://user-images.githubusercontent.com/682595/186026856-fbcc15bb-4abc-41e5-8d2b-08897bcbe1bc.mp4

[hrsh7th]

First, most language servers tested in VSCode. So it's importa t that the lsp related plugin works the same as the VSCode.

I think the VSCode handles the InsertReplaceTextEdit as the same as latest nvim-cmp.

https://github.com/microsoft/vscode/blob/main/src/vs/editor/contrib/suggest/browser/suggest.ts#L239 https://github.com/microsoft/vscode/blob/main/src/vs/editor/contrib/suggest/browser/suggest.ts#L101

[keithpl]

I'm not sure what the next step is; before 27bc575 ConfirmBehavior.Replace was working as expected, post 27bc575 ConfirmBehavior.Replace started inserted the entire suggestion at the cursor position.

Are you stating the problem is with the language server?

[lvimuser]

See https://github.com/hrsh7th/nvim-cmp/pull/1140 and https://github.com/hrsh7th/nvim-cmp/issues/1156 The change wasn't without reason, simply reverting it will cause a regression