In Vim9 script, it is no longer needed to temporarily reset the 'cpoptions' option, because that's already done by :vim9script. See :h :vim9script.
A side effect of :vim9script is that the 'cpoptions' option is set to the
Vim default value, like with: >
:set cpo&vim
One of the effects is that |line-continuation| is always enabled.
The original value of 'cpoptions' is restored at the end of the script.
In Vim9 script, it is no longer needed to temporarily reset the
'cpoptions'
option, because that's already done by:vim9script
. See:h :vim9script
.Thank you for writing this plugin.