/tmp/file in the current directory, rather then trying and failing to create
a symlink named "." in the current working directory).
- implement 'ls -R'.
- - "cp -a sourcedir/*" (note: no dest) - produces an odd error message about
- the last file in the dir, rather than saying "missing destination file".
- "math" should also take input from stdin
- "more" doesn't accept " " to scroll by one page when BB_FEATURE_USE_TERMIOS
is not on.