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+function txt=objectlist2string(L)
+//auxiliary function for conversion of a list of objects
+//into a string vector
+ txt=[];
+ for o=L,
+ if type(o)==15 then //EOL case
+ txt=[txt;'<'+o(1)+'>'],
+ else
+ txt=[txt; string(o)],
+ end
+ end
+ if txt==[] then txt='<empty>',end
+endfunction