Fix explode() changelog entry

Drive-by indentation fix of the section

Author: Girgias

reference/strings/functions/explode.xml

@@ -94,23 +94,24 @@
  <refsect1 role="changelog">
   &reftitle.changelog;
   <informaltable>
-    <tgroup cols="2">
-      <thead>
-       <row>
-        <entry>&Version;</entry>
-        <entry>&Description;</entry>
-       </row>
-      </thead>
-      <tbody>
-       <row>
-        <entry>8.0.0</entry>
-        <entry>
-          <function>explode</function> will now throw <classname>TypeError</classname> 
-          when <parameter>separator</parameter> parameter is given an empty string ("").
-        </entry>
-       </row>
-      </tbody>
-    </tgroup>
+   <tgroup cols="2">
+    <thead>
+     <row>
+      <entry>&Version;</entry>
+      <entry>&Description;</entry>
+     </row>
+    </thead>
+    <tbody>
+     <row>
+      <entry>8.0.0</entry>
+      <entry>
+       <function>explode</function> will now throw <classname>ValueError</classname>
+       when <parameter>separator</parameter> parameter is given an empty string
+       (<literal>""</literal>).
+      </entry>
+     </row>
+    </tbody>
+   </tgroup>
   </informaltable>
  </refsect1>