development(7) style changes

[0mp]

Summary

Changes:

• Use Fx when referring to FreeBSD.
• Use Ql instead of Cm for command invocations.
• Remove some redundant Pp macros.
• Use a literal indented Bd instead of a series of Dl macros.

Also, shouldn't mergemaster be mentioned after installworld in the second example?

[eadler]

man/man7/development.7

121–122 ↗

(On Diff #41614)

while here: add svnlite if it isn't already there.

[0mp]

Reference svnlite(1) as suggested by @eadler.