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Mat Strangeandopencode
23c8dfa974
`Session::set_document` resets everything about the open document — the
document id, the document, the selection, the undo history, the password,
the file name — but not the version snapshots. A snapshot taken of one
document therefore survived `file.new`, `file.open`, `file.newFromTemplate`
and `file.recover`, and `file.versions {"restore": index}` then put the
previous document's content into the open one.
The snapshots go with the document they were taken from: `set_document`
clears them, so a restore can only ever bring back a version of the
document that is open. Every caller replaces the document with another
one (a new or opened file, a recovered copy, a merge result, a sheet of
labels), so none of them loses anything it needs.
Co-Authored-By: opencode <noreply@opencode.ai>