bug#35943: 26.2; `count-lines-page' gives wrong line count (off by one)

[Drew Adams]

> retitle 35943 page-delimiter doesn't include the newline by default

FWIW, I don't think page-delimiter should include the
newline by default.  It has long not included it, and
there are certainly both existing code and user habits
and expectations that depend on the longstanding default
behavior. Also, a form-feed char (^L) is traditionally
a/the page delimiter.

And as Noam points out, users can customize
`page-delimiter'.  The default value should not be
changed.