The missing 
at the end of b. 36 in FE (→GE1), although not confusing, seems to be an inaccuracy, so that GE2 (→GE3) added the mark. However, it is quite likely that it was the 
mark in b. 37 that was unnecessarily placed by the engraver of FE. Chopin used a similar pedalling on a number of occasions, e.g. in the Nocturne in F Major, Op. 15 No. 1, b. 72-73, the Ballade in F Minor, Op. 52, b. 12-13, the Sonata in B Minor, Op. 58, III mov., b. 118-119. A version without a repeated mark at the beginning of b. 37 is featured in EE, which, unless it is a mistake, may be a proof that it was added in the last phase of proofreading of FE. In effect, the source versions define two potentially authentic pedallings; therefore, in the main text we suggest a variant solution in which the optional pedal change at the beginning of b. 37 is left at the discretion of the performer.
Compare the passage in the sources»
category imprint: Differences between sources; Editorial revisions
issues: Inaccuracies in FE, Errors in EE, GE revisions, Authentic corrections of FE
notation: Pedalling