> It is not just frequent, it is what we have always called "the right
> way". Using concat has been slightly deprecated, partly because it
> won't work in the case where the directory name fails to end in a
> slash.
Can't happen when file-name-as-directory is used, right?
The method of using concat *and* file-name-as-directory is a reliable
method. However, it is considerably more cumbersome than just using
concat--or just using expand-file-name.
So maybe it will work better to define a convenient function
as the new recommendation.
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