¿Cómo eliminar más de un carácter de espacio en blanco de HTML?

Quiero eliminar los espacios en blanco adicionales que vienen del usuario final, pero no puedo predecir el formato del HTML.

Por ejemplo:

<p> It's interesting that you would try cfsetting, since nothing in it's
documentation would indicate that it would do what you are asking.
Unless of course you were mis-reading what "enableCFoutputOnly" is
supposed to do.


</p>



<p>



It's interesting that you would try cfsetting, since nothing in it's
documentation would indicate that it would do what you are asking.
Unless of course you were mis-reading what "enableCFoutputOnly" is
supposed to do.</p>

Por favor, indíqueme cómo eliminar más de un carácter de espacio en blanco de HTML.

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