i use editor.text to fill my editor

but in the html code i use to fill my editor, there are accents
example :

editor.text="la france est débordé par l'ouest"

in the editor  i see:

"la france est dbordpar louest"

special characters don't appear

how can i replace each special characters by good html code
exple : "é" becomes "é" etc ...
do i have to replace each characters ?

i saw in the documentation the cleanuphtmlcode() method, but it doesn't work, how can i use it
i get  an error with "editor.cleanuphtmlcode() ".

 

thanks