gh-138019: better help messge for json.tool same as ast

[yihong0618]

As issue comment, in #138019
maybe we can provide better help message for infile the same as ast and tokenize
cc @picnixz @StanFromIreland

• Issue: Improve help message for python -m json.tool #138019

[picnixz]

That would indeed be helpful. Is it the same as for ast and tokenize?

[yihong0618]

That would indeed be helpful. Is it the same as for ast and tokenize?

yes both ast and tokenize have this message

[StanFromIreland]

Please do not use the Update Branch button unless necessary (e.g. fixing conflicts, jogging the CI, or very old PRs) as it uses valuable resources. For more information see the devguide.

[picnixz]

Thank you! (please don't commit anything now)

[yihong0618]

Please do not use the Update Branch button unless necessary (e.g. fixing conflicts, jogging the CI, or very old PRs) as it uses valuable resources. For more information see the devguide.

learned that, thank you