Re: [PATCH v4 2/4] man/man5/tunables.conf: Document system-wide tunables config

The problem I had with .PD placement was not the compactness of the list
itself, but the inter-line spacing between the list and
previous/following paragraphs.  You just have to know to put the .PDs
before the paragraphs that come after the space you want to affect:

.P
normal paragraph
.P
* list item
.PD 0
.P
* list item
.P
* list item
.P
* list item
.PD
.P
normal paragraph

My HTML background had me put the first .PD before the first list item,
which bunched the list up against the previous paragraph.