Something that separates blocks of HTML, such as <hr>

''(I know I put one of those around here somewhere...''
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'''''Ah!''' ^ There it is!!! ;-)''
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Yet another one... Four or more '-' chars at the start of a line equals <hr> in Wiki.
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One more, just for the sake of it-

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A hierarchy of HorizontalSeparators
using dashes, underscores and indented dashes:

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