Fixes the crash below by sanitizing the title to not include the
linebreak (replacing it by a "\n" string)
stack traceback:
[C]: in function 'nvim_buf_set_lines'
.../nvim/plugged/plenary.nvim/lua/plenary/window/border.lua:222: in function '__align_calc_config'
.../nvim/plugged/plenary.nvim/lua/plenary/window/border.lua:266: in function 'new'
...are/nvim/plugged/plenary.nvim/lua/plenary/popup/init.lua:384: in function 'create'
...re/nvim/plugged/telescope.nvim/lua/telescope/pickers.lua:326: in function '_create_window'
...re/nvim/plugged/telescope.nvim/lua/telescope/pickers.lua:399: in function 'find'
...m/plugged/telescope.nvim/lua/telescope/builtin/files.lua:151: in function 'v'
...m/plugged/telescope.nvim/lua/telescope/builtin/files.lua:475: in function 'v'
...im/plugged/telescope.nvim/lua/telescope/builtin/init.lua:487: in function 'grep_string'
Fixes#2023