A
compare
Chopin added 
to A most probably – as was the case with sempre legato – after [FC] had been finished, although in the case of a single, inconspicuous mark an oversight, e.g. by the copyist, cannot be ruled out. In EE2 the mark was added after comparing it with GE1.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions
notation: Verbal indications