In my attempts to have tables with columns not wrapping their text (See https://www.mediawiki.org/wiki/Topic:Vt0oqcj6dvqqyl6d), I came up with a solution for SimpleTable.php, a change to convertTable so only the last column wraps
if ($col < sizeof($fields)-1) { $wikitab .= $cbar . ' <span style="white-space: nowrap;">' . $field . "</span>\n"; } else { $wikitab .= $cbar . " " . $field . "\n"; }