improvement to latex highlighting code

[tormec]

Hello,
this is my revision about how GeSHi highlights latex code.
Refer to the "changes" section in the same script for what I've done.
The image attached provides the final result (on the right) compared to the actual rendering.

[tormec]

Now match also

\begin{align*}
...
\end{align*}

[tormec]

The list of LaTex packages has been made with the following script

<?php
$tag = '<div class="dt"><a href="/pkg/';
$alphabet = array(
    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
    'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z');
$packages = array();
foreach ($alphabet as $pg) {
    $content = file('https://ctan.org/pkg/:'.$pg);
    foreach ($content as $row) {
        $row = trim($row);
        if (strpos($row, $tag) !== false) {
            $packages[]= strstr(substr($row, strlen($tag)), '"', true);
        }
    }
}
$multi_str = '';
$str = '';
asort($packages);
foreach ($packages as $key => $val) {
    $str .= "'" . $val . "'" . ', ';
    if (strlen($str) >= 100 || $key == array_key_last($packages)) {
        $str .= '<br>';
        $multi_str .= $str;
        $str = '';
    }
}
echo $multi_str;

each keyword row spans 100 characters.