[dev.simd] simd/_gen/unify: fix some missing environments
There were a couples places where we failed to provide a reasonable
variable environment for YAML encoding. I think this only affects
encoding "!repeat" nodes, which aren't common in practice and a bit of
a disaster, which is how this went unnoticed.
Change-Id: I1a37c00d5eaa1ee8e86d119a2fd73f6a28d69008
Reviewed-on: https://go-review.googlesource.com/c/go/+/698115
Auto-Submit: Austin Clements <austin@google.com>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>