The traces of changes of rhythm and articulation visible in A allow the interpretation of an already earlier version of this place, which enables tracking the three-stage process of the subtle improvement of the melodic line in this bar:
A originally 
A eventually 
Proofreading of GE1 
.
All three versions, whose nature is rather of interpretative variants, prove that Chopin was looking for the most accurate manner of performing and writing this place, at the same time offering insight into the secrets of his rubato.
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category imprint: Differences between sources; Corrections & alterations
issues: Corrections in A, Authentic corrections of GE
notation: Rhythm