JSFiddle - React, Tailwind, and code Playground

HTML

<p>
  <!-- Can be copied as one unbroken string -->
  <span>1234</span><span>5678</span><span>9123</span><span>4567</span>
</p>

<p>
  <!-- Whitespace between tags will introduce space on copy -->
  <span>1234</span>
  <span>5678</span>
  <span>9123</span>
  <span>4567</span>
</p>

CSS

body {
  font-family: monospace;
}

span:not(:first-child) {
  margin-left: 10px;
}