ram_size doesn't << 20 by default since #758

[trdthg]

When I run the act tests, some test cases (ld, sd, ...) enter an infinite loop, and I finally found the reason

But I think the current behavior is better, but users who don't know should be noticed

[Timmmm]

Hmm does it not give an error if you pass -z 123? Seems like the option was removed entirely and is now in the config.

[jordancarlin]

See #829. The short form of the option wasn’t removed.

[trdthg]

Of course it will give an error (after I removed the opt)

I updated the act test template and use the modified config.json to run test. I just wanted to say that the behavior changed