The change of 
to 
in GE is probably an arbitrary revision by the publisher or even a mistake. A possible correction by Chopin seems much less likely due to the musically unjustified, excessive contrast with 
, in force from bar 86 and in bar 88 (the Chopinesque in bar 92 follows and constitutes a spectacular and definite ending to the variation – cf. also the dynamics in bars 58-62).
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category imprint: Differences between sources
issues: GE revisions
notation: Verbal indications