Yes, Go templating is quite hard. There was a feature request[1] to implement the Django/Jinja2-like Pongo2 template engine[2], but got rejected because it would have been a too big change.
The only tool I'm aware of that can (mostly) correctly reformat Django templates is the PyCharm/IntelliJ family of IDEs, but their reformatting often introduces subtle breakage (such as adding new lines inside tag attributes) and requires careful review.