Chopin would often leave the last 
mark without the closing 
asterisk – cf., e.g. the Prelude No. 7 in A Major. Therefore, the mark added in FE, most probably by Fontana, almost certainly does not correspond to Chopin's intention. The presence of a in CGS is one of many details pointing to FE being the basis of that copy.
Compare the passage in the sources »
category imprint: Differences between sources
issues: FE revisions, No pedal release mark
notation: Pedalling