Templates insert a single newline character at the beginning of text (not an HTML break tag (<br />)). This usually
has no effect because HTML compresses all whitespace into a single space. But when a template appears inline in a
sentence this can add an undesirable space.
Examples are the use of [[w:Template:IPA]], which is often placed within brackets.
I'm pretty sure wikimedia *didn't* do this until a few weeks ago.