Path source does not properly escape file names with special characters, e.g. \, $, % etc. in cmdline

[Bekaboo]

Make sure you have done the following

• I have updated to the latest version of blink.cmp
• I have read the README

Bug Description

Path source does not properly escape file names with special characters.

Steps to repro:

1. Create a file file_with_%sign.txt
2. Use the default config, :e then select the entry corresponding to the test file
3. Hit <C-y> to confirm the selection
4. file_with_%sign.txt (without escape) is inserted to the cmdline, this will make nvim expand '%' to current buffer name and open the wrong file. Desired output: file_with_\%sign.txt

Relevant configuration

All default.

neovim version

0.10.3

blink.cmp version: branch, tag, or commit

main