run-tests: move diff generation into TestResult TestResult is the thing that captures all our test results. It's logical for diff viewing to be handled there and not inside Test. While writing this patch, it was discovered that Test.fail() was printing redundant test result output. This has been removed. Arguments controlling diffs have been removed from Test.__init__.

run-tests: remove global abort flag The global abort flag has been moved into each Test instance. A Test.abort() accomplishing the same thing has been added.

merge: add conflict marker formatter (BC) Adds a conflict marker formatter that can produce custom conflict marker descriptions. It can be set via ui.mergemarkertemplate. The old behavior can be used still by setting ui.mergemarkers=basic. The default format is similar to: {node|short} {tag} {branch} {bookmarks} - {author}: "{desc|firstline}" And renders as: contextblahblah <<<<<<< local: c7fdd7ce4652 - durham: "Fix broken stuff in my feature branch" line from my changes ======= line from the other changes >>>>>>> other: a3e55d7f4d38 master - sid0: "This is a commit to master th... morecontextblahblah