[jOOQ/jOOQ#8803] Improve performance of StringUtils#replace()

Replace `buf.append(text.substring(start, end))` with `buf.append(text,
start, end)` in `StringUtils#replace()`.

jOOQ/src/main/java/org/jooq/tools/StringUtils.java

@@ -780,14 +780,14 @@ public final class StringUtils {
         increase *= (max < 0 ? 16 : (max > 64 ? 64 : max));
         StringBuilder buf = new StringBuilder(text.length() + increase);
         while (end != INDEX_NOT_FOUND) {
-            buf.append(text.substring(start, end)).append(replacement);
+            buf.append(text, start, end).append(replacement);
             start = end + replLength;
             if (--max == 0) {
                 break;
             }
             end = text.indexOf(searchString, start);
         }
-        buf.append(text.substring(start));
+        buf.append(text, start, text.length());
         return buf.toString();
     }