in 
Chopin changed the mordents in bars 79 and 81 to short grace notes probably while creating [A]. The non-slashed grace notes in GE and EEC were arbitrarily inserted by the engravers, who did not use slashed grace notes in the entire Mazurka even once, and in the case of GE, the entire opus 63 is devoid of them.
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category imprint: Differences between sources; Corrections & alterations
issues: Inaccuracies in GE, EE inaccuracies
notation: Ornaments