In FE, there is no 
raising c2 to c
2. Visible traces of corrections in print reveal that it was a1 that was the original version; it was moved to the correct pitch in the proofreading, yet without . This patent oversight (of the engraver or of Chopin at the time of marking the correction) was revised both in GE and EE.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources; Corrections & alterations; Source & stylistic information
issues: EE revisions, Errors resulting from corrections, Terzverschreibung error, GE revisions, Omission of current key accidentals, Authentic corrections of FE
notation: Pitch