[bug #57538] [me] incorrect computation of space `ne`eded by `(b` blocks

[Dave]

Follow-up Comment #9, bug #57538 (project groff):

Thanks for tracking down this mewling kitten, Branden!

The original longstanding bug (as the opening comment here observes, it was
first reported to bug-groff in 2012) made me long ago excise .(b/.)b from my
own -me documents.  Thus my only test cases now are the ones posted here,
which you've already verified.

But why should .ne's parameter need to be adjusted so?  The
diversion-adds-an-extra-line-feed explanation only takes you so far, since
using .ne in place of the .(b/.)b pair in the original example -- which,
absent those two -me macros, does not use a diversion -- still results in a
premature page break when the seven-line block would fit on the last seven
lines of the page.

That makes this fix feel more like a workaround to the underlying problem,
which is that .ne "grabs" more space than necessary.  And the thread linked in
comment #1 suggests this problem isn't limited to the -me package.

That is, while I originally reported this problem in -me's .)b macro, I'm
beginning to think the underlying problem is with .ne itself.

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