The absence of 
in the editions, even if it is not a result of Chopin's proofreading in FE, could have been accepted by the composer who seems to be reducing the number of performance indications (mainly dynamic) in many places, leaving more scope for performers in this respect. Cf., e.g., bars 1-16, as well as notes to the Etude in E
major, No. 11, bars 1-14 or Etude in C minor, No. 12, bars 2-10.
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category imprint: Differences between sources
issues: Authentic corrections of FE
notation: Verbal indications