In FE (→GE), there is no ending of the slur in a new line. It is one of the frequent mistakes of first editions. The continuation of the slur was added by the reviser of EE.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources; Source & stylistic information
issues: EE revisions, Inaccuracies in FE, Uncertain slur continuation, Errors repeated in GE
notation: Slurs