crypto/x509: reformat test struct.
crypto/x509: reformat test struct.

https://golang.org/cl/67270 wasn't `go fmt`ed correctly, according to
the current `go fmt`. However, what `go fmt` did looked odd, so this
change tweaks the test to use a more standard layout.

Whitespace-only; no semantic change.

Change-Id: Id820352e7c9e68189ee485c8a9bfece75ca4f9cb
Reviewed-on: https://go-review.googlesource.com/69031
Run-TryBot: Adam Langley <db68fba232b2c49ed3e9d3081df349dde7b61dfd@golang.org>
Reviewed-by: Martin Kreichgauer <dae0997473f3faad3542e1712b75dbf7875229a8@google.com>
Reviewed-by: Adam Langley <db68fba232b2c49ed3e9d3081df349dde7b61dfd@golang.org>

josharian/go,golang/go,akutz/go,akutz/go,CAFxX/go,josharian/go,nawawi/go,nawawi/go,Cofyc/go,Cofyc/go,josharian/go,cloudflare/go,CAFxX/go,nawawi/go,cloudflare/go,Cofyc/go,polyverse-security/go,codestation/go,CAFxX/go,cloudflare/go,akutz/go,polyverse-security/go,Cofyc/go,Cofyc/go,codestation/go,cloudflare/go,christopher-henderson/Go,Cofyc/go,nawawi/go,codestation/go,akutz/go,josharian/go,codestation/go,CAFxX/go,josharian/go,cloudflare/go,polyverse-security/go,josharian/go,cloudflare/go,akutz/go,codestation/go,Cofyc/go,akutz/go,polyverse-security/go,golang/go,golang/go,golang/go,CAFxX/go,CAFxX/go,josharian/go,golang/go,Cofyc/go,akutz/go,nawawi/go,codestation/go,polyverse-security/go,akutz/go,polyverse-security/go,codestation/go,nawawi/go,nawawi/go,codestation/go,golang/go,josharian/go,cloudflare/go,nawawi/go,golang/go,polyverse-security/go,cloudflare/go,CAFxX/go,polyverse-security/go,CAFxX/go,golang/go