As in many other places, Fontana replaced the Chopinesque grace note with a common short grace note (the change also got to EE2, probably via GE1). In the main text we keep the notation of A (→FE→EE1), although it most probably carries the same meaning as a 
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category imprint: Differences between sources
issues: EE revisions, Non-slashed grace notes, Fontana's revisions
notation: Ornaments