Item link double bold formatting issue

[ldilley]

In commit dd2c5fa, a bug was introduced where 2 groups of Discord bold formatting characters cancel one another out. For example, **[item]** not followed by another item link works fine. However, when 2 items are linked in succession, the contents are **[item1]****[item2]**. The group of 4 asterisks unbolds any subsequent text following a pair of asterisks until another pair is encountered in the string.