path for all args except the first. So "which cp vi" found /bin/cp
using the first entry in the path, but failed to find /usr/bin/vi
using the second entry in the path, although "whereis cp vi" worked.
Restoring the ":" was done in the wrong place.
Also fix a bug in which an arg beginning with "/" would cause all
subsequent args to be ignored. A "break" should have been "continue".
Add comments to all break and continue statements saying what they are
intended to do.
Also add braces around the body of a for loop which contained only one
multi-line statement.
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