new_load local naming syntax with = no longer works

[shahms]

As part of working around an upstream project which is not "empty glob" clean, I run:

buildozer 'new_load @io_kythe//tool:build_rules/support.bzl glob=allow_empty_glob' ...

This use to work and add the load:

load("@io_kythe//tools:build_rules/support.bzl", glob="allow_empty_glob")

To the corresponding files. It now appears to entirely ignore the part before the = sign. This is a regression.