Add capability to underline Headings with correct representation in TOC

[NumaanHuq@…]

Add capability to underline heading and not have them come out as something like this:

__HeaderOne__
 __SubheaderOne__
 __SubheaderTwo__
__HeaderTwo__

in the TOC displayed on the page

[Matthew Good]

The [[PageOutline]] macro provided with Trac 0.9 handles this fine. If this is a problem with the [[TOC]] macro found in the MacroBazaar please file a ticket on ​the TracHacks site.

However, I should note that if you simply want to underline all your headers this is more easily done with CSS in the site_css.cs file (see TracInterfaceCustomization):

h1, h2, h3, h4, h5, h6 { text-decoration: underline; }