REPL feature: Re-print prompt when resumed

Feature or enhancement

Proposal:

Currently, the Python REPL does not re-print the prompt after it is resumed after being suspended after the SUSP character is typed on the terminal.
The Python process needs to add a handler for the SIGCONT signal that re-prints the prompt.
Otherwise, a resumed Python REPL process looks broken:

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-155662

從 Python REPL 進入點開始，檢查終端機暫停和訊號的處理方式，重點關注 SIGCONT。透過暫停並恢復互動式 REPL 來重現此問題，然後確認恢復後提示字元是否會重新列印。此 issue 連結了 PR gh-155662，因此請在開始前檢查這項工作。