scmutil: 0-pad transaction report callback category...
scmutil: 0-pad transaction report callback category
Before this patch, the transaction name was '%2i-txnreport', which
means the first one would be ' 0-txnreport'. It seems more intuitive
for sorting purposes (the callbacks are called in lexicographical
order) to make it 0-padded.
Differential Revision:
https://phab.mercurial-scm.org/D1917
