What does 'go version' print?

go version go1.3.1 windows/amd64

What steps reproduce the problem?
If possible, include a link to a program on play.golang.org.

1. Run http://play.golang.org/p/mtWFU1M8-G

What happened?

Five tests fail.

What should have happened instead?

No tests fail.

Please provide any additional information below.

When printing a composite type containing values that implement fmt.Formatter and using
format strings such as "%+v" and "%#v", the type's Format(f
fmt.State, c rune) method is called such that f.Flag('+') == false and f.Flag('#') ==
false.

I couldn't find any tests cases that exercise this combination of features and the
documentation seems ambiguous on this particular usage. The package documentation only
gives special exemptions to %T and %p with regard to implementing fmt.Formatter. It
would seem when printing a composite structure that did not itself implement
fmt.Formatter, but contained values that did, that a "%+v" or a
"%#v" format should apply to each contained value just as a "%+q" or
a "%#x" does.

Note that when printing individual values the '+' and '#' flags *are* discoverable, it
is only when the value is reached indirectly through a composite value that the '+' and
'#' flags are not passed on (and only for the 'v' verb).