According to us, the 
mark used by Chopin is to be understood as continuation of the previous one, which is indicated by the homogeneity of figurations and structural issues (four-bar section with 1+1+2 structure). In the times of Chopin, two signs | at the transition between the lines were commonly interchangeably used with | 
.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Hairpins denoting continuation
notation: Articulation, Accents, Hairpins