Never apply string formatting to generated errors with util.Abort. Otherwise error messages containing % chars yield errors or worse. Fixed (hopefully) all users of util.Abort.

#!/bin/sh

hg init
echo This is file a1 > a
hg add a
hg commit -m "commit #0" -d "1000000 0"
touch b
hg add b
rm b
hg commit -A -m"comment #1" -d "1000000 0"