Decoding Forsencode with encoded newline cause error.

[rod41732]

When decoding forsencode with newline ('\n', encoded as fÖRsEn) inside it, neovim will show the error

Error executing Lua callback: ...vim/site/pack/packer/start/forsen.nvim/plugin/forsen.lua:58: String cannot contain newlines                                                                                                        
stack traceback:                                                                                                  
        [C]: in function 'nvim_buf_set_lines'                                                                     
        ...vim/site/pack/packer/start/forsen.nvim/plugin/forsen.lua:58: in function<...vim/site/pack/packer/start/forsen.nvim/plugin/forsen.lua:51> 

Reproduction

• encode some string that contains newline and save it into file.
• open then file with nvim
• decode the line by going into visual mode and :ForsDecode and press enter