If in Preferences/Evaluator columns (File Display Columns) a column returns a 'double', the Example column will always show its value with 6 decimal digits, even if they're all zeroes.
A value like 5 will show as 5.000000 in the Example column but 5 in a lister.
<evalcolumn align="0" attrrefresh="no" autorefresh="no" customgrouping="no" foldertype="all" header="Test" keyword="Test" maxstars="5" namerefresh="no" nocache="no" reversesort="no" supportmarkup="no" title="Test" type="3">return 5;</evalcolumn>