bsd-family-tree: tidiness, width

Tidy the raggedness in the section that begins [44B]. As the line that begins
[KB] was previously tidied, now tidy the section to accommodate [BSDI] and
[TUHS]. Rewrap the section to fit the same number of columns.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/812