Tag descriptions with continuation lines starting with * parsed incorrectly

[tmdk]

When a tag description contains continuation lines that begin with *, the * appears
twice in the parsed output. This affects block-style @param descriptions (common in
WordPress docblocks) where list items or @type alignment uses a leading star:

/**
 * @param array $foo {
 *     Description of foo.
 *
 *     @type string $bar Description of bar with
 *                       * a list
 *                       * spanning *multiple* lines
 * }
 */

The parsed description for $foo would incorrectly contain ** a list instead of
* a list.

Fixed in #444