make assignments/redirects work with builtins
make assignments/redirects work with builtins

Ignore-this: f44a7704dde1b2e79307b5175df196f2

darcs-hash:20081119035414-0087a-7f3ef41ba99fcbfecf96df1fcf62fc9b32709209

shicks/shsh,shicks/shsh