diff --git a/common/src/main/java/org/zhdev/util/StringUtils.java b/common/src/main/java/org/zhdev/util/StringUtils.java
old mode 100755
new mode 100644
index 7f9df2e..082e816
--- a/common/src/main/java/org/zhdev/util/StringUtils.java
+++ b/common/src/main/java/org/zhdev/util/StringUtils.java
@@ -128,11 +128,9 @@ public class StringUtils {
 
     public static String escape(String str, String escape, char... chars) {
         StringBuilder builder = new StringBuilder(str);
-
         for (char c : chars) {
             replace(builder, String.valueOf(c), escape + c);
         }
-
         return builder.toString();
     }
 
@@ -142,11 +140,9 @@ public class StringUtils {
 
     public static String unescape(String str, String escape, char... chars) {
         StringBuilder builder = new StringBuilder(str);
-
         for (char c : chars) {
             replace(builder, escape + c, c);
         }
-
         return builder.toString();
     }