Description

When using toggle_format for multi-byte char, only the first byte of the last char will be chosen.

Steps to Reproduce

1. Type 这是一段文本.
2. Visual selection it.
3. Type <leader>mb.
4. 本 is split to 3 bytes, and ** is add after the first byte.

Expected Behavior

**这是一段文本**

Actual Behavior

Environment

• Neovim version: 0.11.5
• Plugin version: e1eb10b
• OS: Linux

Additional Context

It happened due to utils.get_visual_selection, in which vim.fn.getpos is used to get the end_col. However, it will return the pos of the first byte instead.

In fact, many vim APIs are designed for byte, which could not handle multi-byte char correctly. It is more recommanded to use neovim APIs like nvim_buf_get_mark. But it need huge changes. So a compromise method may be acceptable, to use byteidx to get the last byte of the char.