don't printexitvalue twice for ls-F /non
prepare for 6.18.02
don't forget to run configure
actually build fresh
more changes
don't exit if diff fails.
Second pass at cleanup.

Unify formatting -- needs another pass or two.

Comment out the completion that makes "compress" unambiguous: it masks
out all commands beginning with "co". Nice example, less nice in practice.

Remove the traditional_complete case of configure, nm and zcat. The "new"
ones are sensible for all.