I've always spelt it with an "a". But my friend insists on spelling it with an "o". Is this an acceptable variant?
I know that "swop" is a variant, having seen it in manuals and help discussions like this, but I've never seen it used in real life (i.e., in US usage). Looks very UK-ish.
protected by tchrist♦ May 29 '15 at 11:42
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