Merge branch 'lt/diff-stat-show-0-lines' into maint

"git diff --stat" miscounted the total number of changed lines when binary files were involved and hidden beyond --stat-count. It also miscounted the total number of changed files when there were unmerged paths. * lt/diff-stat-show-0-lines: t4049: refocus tests diff --shortstat: do not count "unmerged" entries diff --stat: do not count "unmerged" entries diff --stat: move the "total count" logic to the last loop diff --stat: use "file" temporary variable to refer to data->files[i] diff --stat: status of unmodified pair in diff-q is not zero test: add failing tests for "diff --stat" to t4049 Fix "git diff --stat" for interesting - but empty - file changes