In A the accent mark is not very long in itself, yet due to the quite dense notation, it fills more or less half the length of the section between the chord and the bar line, which allows us to consider it a long accent. This is how it was reproduced in GE. The short accents in the remaining editions are inaccuracies by the engravers. See also the notes on bars 249-253 and 254-256.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Long accents, Inaccuracies in FE, EE inaccuracies,
notation: Articulation, Accents, Hairpins
