Fix incomplete pattern match in Prompt
Fix incomplete pattern match in Prompt

Ignore-this: 6d5ec9526fd15ae8ce24617e0b6c6a6f
Unsupported prompt expansions now get printed literally.

darcs-hash:20081112003316-0087a-f3a5cdf07af8f8d25e17a7af59090770f0077d24

shicks/shsh,shicks/shsh