Before there was this comment:
Can't strip trailing slashes since module.js incorrectly
thinks dirname('/a/b/') should yield '/a/b' instead of '/a'.
But now, such thinking is corrected.
Previously path.dirname('/tmp') incorrectly returned '.'.
Unfortunately module.js incorrectly thinks dirname('/a/b/') should
yield '/a/b', so I can't strip trailing slashes yet. Once module.js
is fixed, then the commented-out code should be activated and a test
written for it.