fix(builtin.keymaps): escape newline chars in desc (#2832)

closes #2827

(cherry picked from commit e065145)

lua/telescope/make_entry.lua

@@ -828,7 +828,7 @@ function make_entry.gen_from_keymaps(opts)
  if entry.callback and not entry.desc then
  return require("telescope.actions.utils")._get_anon_function_name(debug.getinfo(entry.callback))
  end
- return vim.F.if_nil(entry.desc, entry.rhs)
+ return vim.F.if_nil(entry.desc, entry.rhs):gsub("\n", "\\n")
  end
 
  local function get_lhs(entry)
@@ -852,14 +852,15 @@ function make_entry.gen_from_keymaps(opts)
  end
 
  return function(entry)
+ local desc = get_desc(entry)
+ local lhs = get_lhs(entry)
  return make_entry.set_default_entry_mt({
  mode = entry.mode,
- lhs = get_lhs(entry),
- desc = get_desc(entry),
- --
+ lhs = lhs,
+ desc = desc,
  valid = entry ~= "",
  value = entry,
- ordinal = entry.mode .. " " .. get_lhs(entry) .. " " .. get_desc(entry),
+ ordinal = entry.mode .. " " .. lhs .. " " .. desc,
  display = make_display,
  }, opts)
  end