On a quick reading, it looks to me as though changing the line
s nameptr "{f}" format.name$ add.period$ 't :=
to
s nameptr "{f{}}" format.name$ add.period$ 't :=
should remove the spacing, but I haven't tested it.
I don't think it would work as every "field" is separated by a space
later. But I found here [1] a function to remove the spaces.
Thanks
Charles
[1] ftp://ftp.tex.ac.uk/tex-archive/biblio/bibtex/contrib/doc/btxFAQ.pdf
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