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Selecting other art drops Puppet Warp pins, ending Edit Text clears the flat view, and a font scan lays type out again. None of these makes an undo step or counts as an edit to save, but each one replaced the document. A background save that finished afterwards compared the document with the one it wrote by pointer, so the document stayed marked modified. Data Recovery also wrote a new copy of a document whose pins had been dropped. DocState now records the documents that these changes replaced, and DocState::same_content counts them as having the same content. The modified flag, the end of a background save and Data Recovery use it. After Edit Text ends, an undo state that was the saved one stays the saved one.