FileHistory return empty enumerable for deleted files

Reproduction steps

1. Create a file and commit
2. Delete the file and commit
3. Query the log for that specific file: IEnumerable<LogEntry> logs = repo.Commits.QueryBy(fileName);

Expected behavior

The logs enumerable contains 2 entries (initial commit and delete commit)

Actual behavior

The logs enumerable is empty

Version of LibGit2Sharp (release number or SHA1)

v0.25.2

Operating system(s) tested; .NET runtime tested

Windows 7
.Net Framework 4.7.1

Note that git log will also (by default) not return any results when specifying the file name only:

However, when telling git explicitly if a revision or a file is specified, git log will show the expected results:

Start at the repo.Commits.QueryBy(fileName) entry point and reproduce the deleted-file history described in the issue. Compare its handling of the file argument with the git log behavior noted in the report. Done means the query returns both the initial and deletion commits, with a regression test covering that sequence.