Either zero or two newlines with org-agenda-block-separator, cannot seem to get one?

[TRS-80]

Hallo,

I tried to change the value of org-agenda-block-separator variable to
many things (including characters and strings, in accordance with the
documentation) however I could not seem to achieve the desired result.

I was trying to make one blank line between agenda blocks in my custom
agenda (defined via org-agenda-custom-commands).  However I could only
seem to either make two, or zero!  :/

Searching for org-agenda-block-separator in org-agenda.el led me to
org-agenda-prepare function, where it appears to me that there is no
way to accomplish what I want, at least by simply changing a variable.

Therefore I ended up commenting out one of the newlines in that
function here in my local source, and re-loaded the file.  And now I
have one blank line between my agenda blocks, just as desired.  :)

But I thought this would be a good idea to bring to the attention of
the mailing list.

Cheers!

TRS-80