When you post a link and the link is defined at the beginning of a line, the link content is previewed like this:
If you find that this clutters up a post, you can stop this from happening by placing preceding characters in front of the line like this:
But the link must be have a [space] prior to it.
One clutter problem with previews links is that it is not clear where the clickable link really is.
And that preceding characters can be a single [space] character: