<p>The problem is that the outer syntax for the link had been entered as <code>[...] (link)</code> with a space between the link "text" and the link target - apparently the old renderer tolerated that but the new one insists on having no space which is probably technically correct, to the extent that anything ever is in markdown.</p>
<p>I've removed the space for that diary post now and that seems to have fixed it.</p>

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