Set output box to be anchored to the window, so it resizes with it

[paulvickery]

Set output box to be anchored to the window, so it resizes with it, to make it easier to examine the results

[google-cla]

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[paulvickery]

@googlebot I signed it!

[paulvickery]

Can this PR have the "hacktoberfest-accepted" label attached please?