Use string builder for building search range values.

src/main/java/org/redisson/RedissonScoredSortedSet.java

@@ -171,16 +171,16 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
     }
 
     private String value(double score, boolean inclusive) {
-        String element;
+        StringBuilder element = new StringBuilder();
+        if (!inclusive) {
+            element.append("(");
+        }
         if (Double.isInfinite(score)) {
-            element = (score > 0 ? "+" : "-") + "inf";
+            element.append(score > 0 ? "+inf" : "-inf");
         } else {
-            element = BigDecimal.valueOf(score).toPlainString();
-        }
-        if (!inclusive) {
-            element = "(" + element;
+            element.append(BigDecimal.valueOf(score).toPlainString());
         }
-        return element;
+        return element.toString();
     }
 
     @Override