Remove code duplication.

[amjith]

Also use nonlocal for mutating.

Description

Fixes the output_res() return signature.
Dedupes the code from output_res()

Checklist

• I've added this contribution to the changelog.md.
• I've added my name to the AUTHORS file (or it's already there).
• I ran uv ruff check && uv ruff format to lint and format the code.

[rolandwalker]

In this try block, we should probably also restore from the deleted code:

                        if self.beep_after_seconds > 0 and t >= self.beep_after_seconds:
                            self.bell()
                        if special.is_timing_enabled():
                            self.echo("Time: %0.03fs" % t)

[amjith]

Thanks! Fixed it.