Is there a tool (ideally command-line-based) that can help in converting the source to HTML tables into “graphical text” (think perhaps ASCII art for HTML tables) for use in code comments (like /*…*/), as show below?

/*
+--------------------------------------------------------------------+
|                              Network                               |
+--------------------------------------------------------------------+
| 11.05.2010 |            ABC            |            DEF            |
+------------+-------------+-------------+-------------+-------------+
|            |    INPUT    |    OUTPUT   |    INPUT    |   OUTPUT    |
+------------+-------------+-------------+-------------+-------------+
|    Value   | 366,899,791 |           0 |     213,001 |   2,132,827 |
+------------+-------------+-------------+-------------+-------------+
*/

Background: A piece of code that reads values from HTML tables can be annotated with comments depicting text-based graphical representations of complex HTML table layouts. Someone maintaining the code later can then find it easier to understand, for example, how a piece of code is slicing and dicing an HTML table or plucking values at certain cell positions.