Use final

Author: garydgregory

src/test/java/org/apache/commons/text/StringSubstitutorTest.java

@@ -1088,7 +1088,7 @@ void testSubstitutePreserveEscape() throws IOException {
     @Test
     void testToString() {
         final StringSubstitutor s = new StringSubstitutor(null, "prefix", "suffix");
-        String str = s.toString();
+        final String str = s.toString();
         assertTrue(str.contains("\"prefix\""), "Had: " + str);
     }
 }

src/test/java/org/apache/commons/text/translate/CharSequenceTranslatorTest.java

@@ -45,7 +45,7 @@ public int translate(final CharSequence input, final int index, final Writer wri
     void testIOException() {
         final CharSequenceTranslator translator = new CharSequenceTranslator() {
             @Override
-            public int translate(CharSequence input, int index, Writer writer) throws IOException {
+            public int translate(final CharSequence input, final int index, final Writer writer) throws IOException {
                 throw new IOException("Test exception");
             }
         };