It is unclear, which length of 
corresponded to the last Chopin's intention. Compatibility of AW and GC (→GE, inaccurately) suggests that GC may include an earlier version, changed by Chopin in the remaining Stichvorlage manuscripts. However, the presence of the longer sign in CDP, generally compatible with FE (and to a lesser extent with EE) denies this interpretation. Perhaps the concurrence of AW and GC is accidental and the sign could have been inaccurately copied by Gutmann.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Inaccuracies in GE
notation: Articulation, Accents, Hairpins