In this case, the easiest explanation for the longer phrase mark of FC (→GE) is a mistake resulting from the change of division of the text into lines. The phrase mark in A reaches almost the end of the line, since b. 377, which ends it, is very tight. The copyist wrote an entire phrase in that line, until b. 378, and wrote a phrase mark whose range was similar to A, yet measured in relation to the end of the line. The ending of the tie of c1, put in A in b. 378, is an alternative opportunity to commit a mistake: Chopin did not place it at the pitch of the note head, but at the end of the stem, as a result of which it looks like a phrase mark.
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category imprint: Differences between sources; Editorial revisions
issues: Inaccuracies in FC
notation: Slurs