The portable Windows job (P11c run 6) failed ledger-core's
`where_backups_go_is_checked`: `/srv/books.git` is not an absolute path
to Windows, and `C:\books` was read as the host `C` of a networked
address. `backup.git_remote` now reads a drive path (one letter, a
colon, a slash or backslash) as a path on this computer, as git does,
and a path from `/` as rooted on every system git runs on; the test
holds the three forms on every OS.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HS8WZziDnyxunC23MUxrLp