change log for P0508540 (close)

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2021-01-3013:58:52Marcin Banaszek P0508540 problems cooktxt  update NL: b) 1. g1=T c7 2. Tb1 Le4 3. Tb3 c8=T# uvm 
2021-01-3013:58:10Marcin Banaszek P0508540 problems solution  updatea) 1. g1=T c7 2. Tc1 c8=D 3. Tc3 Dg4# b) 1. gxh1=S c7 2. Sf2 c8=L 3. Sd3 Le6# NL: b) 1. g1=T c7 2. Tb1 Le4 3. Tb3 c8=T# uvm a) 1. g1=T c7 2. Tc1 c8=D 3. Tc3 Dg4# b) 1. gxh1=S c7 2. Sf2 c8=L 3. Sd3 Le6#  
2021-01-3013:54:02Marcin Banaszek 1892 Problemista 83 06/1968 refsrc sourceno  update 83 
2021-01-3013:54:02Marcin Banaszek 1892 Problemista 83 06/1968 refsrc number  update 1892 
2021-01-3013:54:02Marcin Banaszek 1892 Problemista 83 06/1968 refsrc date  update1968  06/1968