Formatting from prompt visible on the terminal

[jcubic]

Issue summary

Formatting from prompt visible on the terminal when both interpreter and prompt have formatting

Expected behavior

It should format the text

Actual behavior

It prints formatting as is

Steps to reproduce

1. Open demo https://codepen.io/jcubic/pen/qBwyrmo?editors=0010
2. Press enter

Browser and OS

Additional notes

It only happens when you return formatting from interpreter and prompt is a function that render formatting.

As a workaround, you can use this.echo() instead of return value from interpreter.

[jcubic]

This didn't get fixed. The formatting is still visible. It get fixed with async command.