ewiki allows you to use tables with the || | characters in the wiki
page source. However the html code for the table layout is
hardcoded and cannot be changed on a per-page basis.
This plugin intercepts the wiki source formation process to allow
you to specify html tag attributes inside a table definition like:

|{ border=0 cellspacing=10}  here is  | the table | content |
| 2nd line | 2nd line |{ rowspan=2}  fills two table rows |
|{ colspan=2}  3rd line |

Note, the opening "{" must follow the "|" character immediately.

This code was provided by Hans B Pufal.

It may be a security risk to include it per default, as this allows
to add SomethingScript+ references as well.
prev << "markup/asciitbl"
next >> "markup/htmltbl"

You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.