gh-131217: new repl display output from all statements, separated by ';'

[skirpichev]

Was:

>>> 1;2
2

Now:

>>> 1;2
1
2

• Issue: New repl shows output only for last statement from several, separated by ";" #131217

[ambv]

I think the original behavior was deliberate as it was also reported by users that pasting larger code pieces caused them to spew a lot of module-level output that was unwanted and confusing.

[skirpichev]

@ambv, I realize there might be reasons for this behavior, as one test was broken.

Yet, as explained in the issue, old repl behave differently. If we are going to replace this - the doctest module should be fixed instead. And we should expect some breakages from this. I'm not sure how this common, the mpmath uses such doctests a lot, e.g.:
https://github.com/mpmath/mpmath/blob/8c6f6603ad0f99074bd0743a9a5e1454da57bc88/mpmath/function_docs.py#L3546-L3548