* Fix flaw in the commit history lookup that caused unnecessary traversal
when the repository contains a lot of merge commits.
Also return the merge commit as the changed one if the file or
directory was changed as part of the merge, eg. through conflict
resolution.
Signed-off-by: Filip Navara <filip.navara@gmail.com>
* Perform history simplification. If a file is present on multiple parents
in a merge commit follow only the first parent.