I created this to emulate the look-and-feel of Windows Explorer, where you click on the
 in front of a folder to expand the list and show sub-folders, which is then replaced by the
 to click on and contract it. The code I use to produce this can be seen in plus_minus.pl.
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First group of items
| Line of data for item1 | | Line of data for item2 | | Line of data for item3 | | Line of data for item4 | | Line of data for item5 |
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Second group of items
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Third group of items
| Line of data for item1 | | Line of data for item2 | | Line of data for item3 | | Line of data for item4 | | Line of data for item5 |
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