The sign in A over the 3rd quaver is not entirely legible (similarly in As and AI) – it reminds a 
rather than a 
. FE (→EE) includes a , whereas in GE there is no ornament at all, which may suggest that the in FE was introduced in the last proofreading. Taking into account this possibility and clear mordents in AII and AIII, in the main text we give a . Actually, in faster tempos both signs were used by Chopin interchangeably. Cf. bar 92.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Authentic corrections of FE, Inaccuracies in A
notation: Ornaments