Invert status output of tests (suffix instead of prefix)

[emidoots]

As it is currently running some tests looks like this:

test vec4::eq_1 ... ok
test vec4::is_zero_0 ... ok
test vec4::fmt_0 ... ok
test vec4::length_sq_0 ... ok
test vec4::is_nan_0 ... ok
test vec4::lerp_0 ... ok
test vec4::length_0 ... ok
test vec4::max_0 ... ok
test vec4::mul_0 ... ok
test vec4::mul_scalar_0 ... ok
test vec4::min_0 ... ok
test vec4::one_1 ... ok
test vec4::one_0 ... ok
test vec4::neg_0 ... ok
test vec4::partial_cmp_0 ... failed
test vec4::normalize_0 ... ok
test vec4::sub_0 ... ok
test vec4::project_0 ... ok
test vec4::round_0 ... ok
test vec4::zero_0 ... failed
test vec4::sub_scalar_0 ... ok

test result: ok. 19 passed; 2 failed; 0 ignored; 0 measured

Because the names are not the most important aspect of the message (the ok/failure status is), I believe it may make sense to invert the status output like so:

[ok] test vec4::eq_1
[ok] test vec4::is_zero_0
[ok] test vec4::fmt_0
[ok] test vec4::length_sq_0
[ok] test vec4::is_nan_0
[ok] test vec4::lerp_0
[ok] test vec4::length_0
[ok] test vec4::max_0
[ok] test vec4::mul_0
[ok] test vec4::mul_scalar_0
[ok] test vec4::min_0
[ok] test vec4::one_1
[ok] test vec4::one_0
[ok] test vec4::neg_0
[failed] test vec4::partial_cmp_0
[ok] test vec4::normalize_0
[ok] test vec4::sub_0
[ok] test vec4::project_0
[ok] test vec4::round_0
[failed] test vec4::zero_0
[ok] test vec4::sub_scalar_0

test result: ok. 19 passed; 2 failed; 0 ignored; 0 measured

Note that:

1. This makes it easier to identify which tests failed or not, because the status is not offset by a name of arbitrary length.
2. This might not make sense if printing the test name is important prior to the status (e.g. if the output is not fully buffered, or if test programs may sometimes hang and the testing framework can't catch this).

[emidoots]

BTW This is more feature request / proposal-ish, so if this is the wrong place for this please let me know! :)

[alexcrichton]

Ah Cargo doesn't actually generate any of this output, it's all part of libtest in the rust-lang/rust repo, could you open an issue over there instead? Thanks!