Missing ‘=’ operator after key in hash literal.

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<div>
  <p>missing '=' operator after key in hash literal.</p>
  <p>Explanation:</p>
  <p>This error message typically occurs in programming languages that use hash literals, such as Ruby. A hash literal is a way to define key-value pairs. The error message suggests that there is a missing equal (=) operator after a key in the hash literal definition.</p>
  <p>Example:</p>
  <pre>
  persons = {name: "John", age: 25, city "New York"}
  </pre>
  <p>In the above example, the equal operator is missing after the key 'city'. The correct syntax should be:</p>
  <pre>
  persons = {name: "John", age: 25, city: "New York"}
  </pre>
</div>

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