added FIXME for quitcd.nu not handling single-quotes

For a directory called
foo'bar
the NNN_TMPFILE will contain
cd 'foo'\''bar'

misc/quitcd/quitcd.nu

@@ -7,6 +7,7 @@ def-env n [...x] {
   ^nnn ($x | str join)
   let newpath = (
     if ($env.NNN_TMPFILE | path exists) {
+      # FIXME: fails if path contains single-quote
       let newpath = (open $env.NNN_TMPFILE | parse "cd '{nnnpath}'").0.nnnpath
       ^rm -f $env.NNN_TMPFILE
       echo $newpath