Assured before release:
{10} Verify that i18n did not break bootstrap.sh

Likely:
 {9} Construct more comprehensive test vectors.
 {8} Look into improving regex performance.
 {7} Improve the documentation.
 {7} Review (and improve?) the error messages.
 {6} Make lib/regex.c handle [[=x=]] and [[.x.]].  (Alternatively:
       make rx library perform reasonably.)

Maybe:
 {5} Warn/error for \` and \' in impossible contexts.
       [Only if can cleanly patch regex.c without breaking other apps
        which really want the distinction between these and ^ and $;
		otherwise this becomes a {1}.]
 {4} Use tcov (or similar) to construct more extensive test vectors.
 {3} Generalize + and ~ addressing (e.g., /foo/+3,/bar/~2 s/foo/bar/).
 {3} Add -N addressing (e.g., /foo/-3,/bar/+2 s/foo/bar/).
 {3} Think of a better way to handle filename parsing (r/w commands).
     But consider:  'r foo;d'  --- is the ;d part of the filename, or
     a second command?  (Any changes will have to check POSIXLY_CORRECT,
     as the current behavior *is* POSIXly correct.)

Unlikely:
 {1} Add filters (Use perl instead.)
