Multiple imports on a single line

[Doug McIlroy]

> I often see a confusion between greater expresiveness (good goal) and
> having to type less (largely irrelevant goal). By all means make the module
> system more expressive, but try to avoid "clever" things for convenience.

To expand upon this principle a bit, syntactic sugar that promises to save O(1) 
typing in an n-line module is suspect; that which might save O(n) is more promising.

Doug