The sign was added by Chopin in a proofreading of FE. In this edition (→GE1,EE2) there is however no , which same as in the other places (e.g., in bars 10-11 and 13) is probably an oversight. In the main text we suggest to complete the mark by analogy with bar 8, yet also a longer pedal hold seems to be totally possible, as it was marked in later GE,s and EE,s.
Compare the passage in the sources »
category imprint: Differences between sources
issues: EE revisions, Inaccuracies in FE, GE revisions, Authentic corrections of FE, No pedal release mark
notation: Pedalling