AttrHistoricalSingle.java: Extracted methods replaceOrDelete(), add(), repl...

Jean-Noel Rouvignac

21.48.2015 8a052d3370a22b1155bc3ba6a200163cb197175d

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user-friendly-name=Sk\u0142adnia Atrybut\u00f3w
user-friendly-plural-name=Sk\u0142adnie Atrybut\u00f3w