Generators: How to use non-shorthand mode?

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(Since this would fit better in discussions, I'm just moving the posts here)
I've made a generator which repeatedly run-length encodes an array for this here: https://staxlang.xyz/#c=%7B%7B3%3Cm%7CA_%251%3D%21*%7Dgf%3AG&i=[1,2,2,1,1,2,1,2,2,1,2,2,1,1,2,1,1]%0A&m=2

How do I prevent shorthand mode and make it push intermediate results to stack? I'm not sure how to do it from the tutorial.

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{{3<m|A_%1=!*}{:Ggf

The key is to terminate the generator block with the g token.

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Originally written by @tomtheisen