[editorial] google_analytics.html: trim trailing whitespace from tpl actions

[chalin]

"Editorial" change only: from {{ ... }} to {{- ... }}, to trim template action trailing whitespace.

[jmooring]

To be consistent with other embedded templates can we trim leading instead? For example:
https://github.com/gohugoio/hugo/blob/master/tpl/tplimpl/embedded/templates/schema.html

[chalin]

Sure whatever convention you prefer.

[jmooring]

Trim leading please... thanks.

[chalin]

Ok, done ✨