The vague mark in A may be interpreted as a slur. It seems that Chopin went out of ink at the time of writing, however, he did not take care of a discernible notation in A, nor did he add the slur while proofreading FE. Therefore, we do not include this mark in the main text. In EE3 (→EE4) a whole-bar long slur was added under the semiquavers.
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category imprint: Graphic ambiguousness; Differences between sources
issues: EE revisions, Inaccurate slurs in A
notation: Slurs