Custom surround <M-]> doesn't work since v2.1.3

[bew]

Checklist

• Have you tried updating the plugin to the latest version?
• Have you checked the Breaking Changes issue?
• Have you read through :h nvim-surround to see if there might be any relevant information there?

Neovim Version

NVIM v0.9.5
Build type: Release
LuaJIT 2.1.1693350652

Plugin Version

Tagged (Stable)

Minimal Configuration

(note I use these in Lua files, to ease changing [[ ... ]]-based strings)

require('nvim-surround').setup {
  surrounds = {
    ["<M-[>"] = {
      add = { "[[ ", " ]]" },
      find = vim.pesc"[[" .. ".-" .. vim.pesc"]]",
      delete = (
        "^" ..
        "(" .. vim.pesc"[[" .. "%s*)()" .. -- removes any number of spaces
        ".-" ..
        "(%s*" .. vim.pesc"]]" .. ")()" .. -- removes any number of spaces
        "$"
      )
    },
    ["<M-]>"] = {
      add = { "[[", "]]" },
      find = vim.pesc"[[" .. ".-" .. vim.pesc"]]",
      delete = (
        "^" ..
        "(" .. vim.pesc"[[" .. ")()" ..
        ".-" ..
        "(" .. vim.pesc"]]" .. ")()" ..
        "$"
      )
    }
  }
}

Sample Buffer

[[  foobar  ]]

Keystroke Sequence

0. fb
1. cs <M-[> <M-]>
2. ds <M-]>

Expected behavior

• After 1., buffer should be [[foobar]]
• After 2., buffer should be foobar

Actual behavior

Nothing happens

Additional context

I bisected the issue to cfa2da7

And neovim devs mentioned to me that calling nvim_replace_termcodes on the result of getcharstr is wrong, the output of getcharstr is already the raw chars!
See neovim/neovim#29034

[kylechui]

Oh yeah I just tagged this change under 2.1.10, so you can update to that instead of tracking HEAD.