transaction: write pending generated files Such file are generated with a .pending prefix. It is up to the reader to implement the necessary logic for reading pending files. We add a test to ensure pending files are properly cleaned-up in both success and error cases.

{header}
# HG changeset patch
# User {author}
# Date {date|hgdate}
# Node ID {node}
{parent%changesetparent}
{desc}

{diff}