bats_print_failed_command: Include $output if available.

[aluzzardi]

Checking $status right after a run seems to be a quite regular use case:

@test "run will fail" {
    run blahblah
    [[ "$status" -eq 0 ]]
}

With this change, the $output of run is included in case of failure, which makes debugging much easier:

 ✗ run will fail
   (in test file broken.bats, line 7)
     `[[ "$status" -eq 0 ]]' failed
     bats/libexec/bats-exec-test: line 58: blahblah: command not found

[aluzzardi]

/cc @vieux @ehazlett

[vieux]

Yes!

[vieux]

LGTM

[ehazlett]

Nice!

On Monday, May 4, 2015, Victor Vieux notifications@github.com wrote:

LGTM

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#101 (comment).

[miketheman]

👍 Applied this today locally, looks cool.

[kazurayam]

Definitely I need this merged

[vieux]

Ping @sstephenson :)

[sameersbn]

👍

[jszwedko]

Bump @sstephenson

[ztombol]

Anyone who wants to get feedback when a test fails should take a look at the discussion in #110 and the libraries that resulted from it.

[mattyclarkson]

This so needs to be merged and released. It's impossible to understand why the test failed on a build server otherwise. @sstephenson

[xmik]

@aluzzardi was there a reason to close this? Is this PR perhaps merged into some official fork (in the context of #150)?