docs/demo/trips/italy-2025/ shares its slug with a real trip (deliberately —
the fixture supplies that trip's GPX and dailies), so demo-load copies this
trip.md straight over the live page. The fixture was a snapshot from before the
trip gained a tagline, so every `make test` silently deleted that tagline from
real content, showing up as an unexplained dirty submodule afterwards.
Re-sync it byte-identically to the live page. The note about keeping colliding
fixtures in sync goes in the Makefile recipe, not here — anything added to this
file lands in real content on the next demo-load.