Assignment in test: OK?

[Karl Heuer]

I suppose that using `:=' would resolve% the problem, in much the same way
that the key-jamming problem was resolved by inventing the pessimal QWERTY.

Karl W. Z. Heuer (karl at kelp.ima.isc.com or ima!kelp!karl), The Walking Lint
________
% I can hardly call it a `fix'.  For me, typing `=' for `==' is no more likely
  than typing `==' for `=' (which I *have* done at least once), and the cure
  would be worse than the disease.  `:=' is almost as clumsy to type as that
  stupid regexp notation `\( \)'.