Spacing in CSS pseudo-element content

A bit of an abstract title but I’m basically taking about:

h4::after {
    content: "";
}

If you have just text in the content property, you can adjust spacing with the letter-spacing and/or word-spacing properties in CSS. Letter-spacing would even work if you have just icons but I had a combination of three icons and a word, and the letter-spacing I wanted between the icons pulled the letters of the word too far apart. You can’t use html in the content property of a pseudo-element like ::before or :: after, so   is out.

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