[tor-dev] git-update: transparently torified git pulls

[grarpamp]

> test x"$url" = x

Some users may be a bit unfamiliar with this longform
'test' construct having trended from that in say
their distro's example rc scripts over recent posix
and bugfixed decades, easier visual delimited parsing,
4 chars of line width saved, to form of...

[ ! "$var" ]

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html

Some like $() over ``, or indenting line continuations too.
As in perl, tmtowtdi, no worries.