I wrote,
Well, first, there's no need for the extra level of nesting, and second,
the separate test that $MONTHFOLDER is non-null is unnecessary:
After dismissing the chance of a null or unset variable by using
* ? test ! -d ${MONTHFOLDER:-/}
I began to wonder whether
* ? test ! -d ${MONTHFOLDER:-.}
would have any advantages or disadvantages. I can't see any either way.
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