trivial adjustment of the desired test results
after getting rid of the "copyless" crutch

When a .Tg is attached to a paragraph, attach the permalink
to the first word, or the first few words if they are short.

Support manual tagging of .Pp, .Bd, .D1, .Dl, .Bl, and .It.
In HTML output, improve the logic for writing inside permalinks:
skip them when there is no child content or when there is a risk
that the children might contain flow content.