title: Variables within gtk_label_set_markup
body: <p>As in title, is there a way to put variables into the string that is processed by <code>gtk_label_set_markup()</code> function?</p>
  
  <p>More specifically, I call this function like this:    <code>gtk_label_set_markup(GTK_LABEL(labelRed), "&lt;span font=\"14\" color=\"red\"&gt;&lt;b&gt;\t\tRed: 999"&lt;/b&gt;&lt;/span&gt;");</code></p>
  
  <p>But, instead of a static text that is '<strong>999</strong>', I want to put in this place an integer variable. Is it possible to do?</p>
  
  <p>Greetings,
  WisNia</p>