title: Why does TextView.setText() warn you not to concatenate strings?
body: <p>If I do something like this</p>
  
  <pre><code>someTextView.setText(someString + " and more!");
  </code></pre>
  
  <p>it warns me "Do not concatenate text displayed with setText. Use resource string with placeholders."</p>
  
  <p>Why does it warn this when string concatenation seems to work just fine?</p>