util: fix default termwidth() under Windows sys.stdout.write('-'*80 + '\n') or sys.stdout.write('-'*80 + '\r') do not work on Windows as they do on unix. On a 80 columns Windows console, the extra CR or LF are interpreted as if belonging to the next line, so the first command displays 2 lines (only one on unix) and the second one leave the line visible and move back to the following line. To avoid this, we sacrifice one column under Windows.

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#!/bin/sh

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hg init

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touch a

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hg add a

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hg ci -m "a" -d "1000000 0"

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echo 123 > b

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hg add b

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hg diff --nodates

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hg diff --nodates -r tip

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echo foo > a

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hg diff --nodates

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hg diff -r ""

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hg diff -r tip -r ""

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true