count-lines-page

[Christoph]

Bug #6825 (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6825) points out 
some peculiar behavior of what-page. This is actually caused by the 
count-lines-page function.

I am wondering if this behavior is intended or a bug itself.

emacs -Q
open a buffer, type test
C-a

i.e.
test
^ point

M-x count-lines-page
Output: Page has 1 lines (0 + 1) (means: 0 before, 1 after)

C-f

i.e.

test
 ^ point

M-x count-lines-page
Output: Page has 1 lines (1 + 1) (means: 1 before, 1 after)

Does this make sense? There is only 1 line in the buffer. How can there 
be 1 before and 1 after?

Christoph