fix(builtin.oldfiles): cwd matching with special characters (#2860)

`vim.fn.matchstrpos({expr}, {pat})` doesn't handle all characters well
since the pattern (cwd path in this case) is used as a regex pattern.

lua/telescope/builtin/__internal.lua

@@ -26,6 +26,15 @@ local function apply_cwd_only_aliases(opts)
  return opts
 end
 
+---@return boolean
+local function buf_in_cwd(bufname, cwd)
+ if cwd:sub(-1) ~= Path.path.sep then
+ cwd = cwd .. Path.path.sep
+ end
+ local bufname_prefix = bufname:sub(1, #cwd)
+ return bufname_prefix == cwd
+end
+
 local internal = {}
 
 internal.builtin = function(opts)
@@ -544,7 +553,7 @@ internal.oldfiles = function(opts)
  cwd = cwd .. utils.get_separator()
  cwd = cwd:gsub([[\]], [[\\]])
  results = vim.tbl_filter(function(file)
- return vim.fn.matchstrpos(file, cwd)[2] ~= -1
+ return buf_in_cwd(file, cwd)
  end, results)
  end
 
@@ -882,14 +891,6 @@ end
 internal.buffers = function(opts)
  opts = apply_cwd_only_aliases(opts)
 
- local function buf_not_in_cwd(bufnr, cwd)
- if cwd:sub(-1) ~= Path.path.sep then
- cwd = cwd .. Path.path.sep
- end
- local bufname_prefix = vim.api.nvim_buf_get_name(bufnr):sub(1, #cwd)
- return bufname_prefix ~= cwd
- end
-
  local bufnrs = vim.tbl_filter(function(bufnr)
  if 1 ~= vim.fn.buflisted(bufnr) then
  return false
@@ -901,10 +902,13 @@ internal.buffers = function(opts)
  if opts.ignore_current_buffer and bufnr == vim.api.nvim_get_current_buf() then
  return false
  end
- if opts.cwd_only and buf_not_in_cwd(bufnr, vim.loop.cwd()) then
+
+ local bufname = vim.api.nvim_buf_get_name(bufnr)
+
+ if opts.cwd_only and not buf_in_cwd(bufname, vim.loop.cwd()) then
  return false
  end
- if not opts.cwd_only and opts.cwd and buf_not_in_cwd(bufnr, opts.cwd) then
+ if not opts.cwd_only and opts.cwd and not buf_in_cwd(bufname, opts.cwd) then
  return false
  end
  return true