In A Chopin divided the diminuendo indication into parts, which he then arranged over bars 28-30. The last entered part is ue, while the rest is missing. In the main text we complement this indication, keeping it proportionally spaced out so that the ending thereof falls on bar 31, which goes well with 
in bar 32. The editions used a standard dim. abbreviation, placing it at the beginning of bar 29, which suggests a slightly later starting point of diminuendo than in A.
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category imprint: Graphic ambiguousness; Differences between sources
issues: GE revisions, Inaccuracies in A
notation: Verbal indications