Add -m for commit and deprecate -t
Index: hg/doc/hg.1.txt
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#!/bin/sh
hg init
touch a
hg add a
hg ci -t "a" -u test -d "0 0"
echo 123 > b
hg add b
hg diff | sed "s/\(\(---\|+++\).*\)\t.*/\1/"
hg diff -r tip | sed "s/\(\(---\|+++\).*\)\t.*/\1/"