in info: M-F passes over a node boundary, but M-B does not

[Benno Schulenberg]

To see what I mean, run 'info/ginfo info xref'.  Then press and
hold M-F.  Hold it down until the cursor has passed into the next
node.  Then press and hold M-B.  The cursor stops at the top of
the node, on the "N" of "Next".  Now type <Left>.  Nothing happens.
Type <Left> again.  Now the cursor moves to the preceding node.

Now press <Right>.  The cursor moves to node 8.1 again.  Press
<Right> again.  The cursor does not move.  Press <Right> again.
Now the cursor does move.  Now press <Left> several times.  The
cursor does not "stick" on the "N" of "Next", it moves smoothly
over the boundary.  Now press <Right> again several times.  Again
the cursor "sticks" for one moment on the "N".

Now press <Right> until the cursor has passed the "N" of "Next",
it doesn't matter how far.  Then press <Left> until the cursor is
exactly on the "N".  Now press M-B.  Now the cursor *does* pass
over the node boundary.

There seems to be a "hole" at each node boundary that the cursor
can "fall into" and get stuck.

Benno

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