Use +=

Author: garydgregory

src/main/java/org/apache/commons/codec/language/Caverphone1.java

@@ -117,7 +117,7 @@ public String encode(final String source) {
         txt = txt.replace("3", "");
 
         // 6. put six 1s on the end
-        txt = txt + SIX_1;
+        txt += SIX_1;
 
         // 7. take the first six characters as the code
         return txt.substring(0, SIX_1.length());

src/main/java/org/apache/commons/codec/language/Caverphone2.java

@@ -121,7 +121,7 @@ public String encode(final String source) {
         txt = txt.replace("3", "");
 
         // 6. put ten 1s on the end
-        txt = txt + TEN_1;
+        txt += TEN_1;
 
         // 7. take the first ten characters as the code
         return txt.substring(0, TEN_1.length());

src/main/java/org/apache/commons/codec/language/DoubleMetaphone.java

@@ -568,7 +568,7 @@ private int handleG(final String value, final DoubleMetaphoneResult result, int
             } else {
                 result.append("KN");
             }
-            index = index + 2;
+            index += 2;
         } else if (contains(value, index + 1, 2, "LI") && !slavoGermanic) {
             result.append("KL", "L");
             index += 2;