Fix the Angular/DateTime-Format-Pipe documant

docs/en/UI/Angular/DateTime-Format-Pipe.md

@@ -5,7 +5,7 @@ You can format date by Date pipe of angular.
 Example
 
 ```html
-<span> {{today | date 'dd/mm/yy'}}</span>
+<span>{%{{{today | date 'dd/mm/yy'}}}%}</span>
 ```
 
 ShortDate, ShortTime and ShortDateTime format data like angular's data pipe but easier. Also the pipes get format from config service by culture.
@@ -13,17 +13,17 @@ ShortDate, ShortTime and ShortDateTime format data like angular's data pipe but
 # ShortDate Pipe
 
 ```html
-<span> {{today | shortDatePipe }}</span>
+<span>{%{{{today | shortDatePipe }}}%}</span>
 ```
 
 # ShortTime Pipe
 
 ```html
-<span> {{today | shortTimePipe }}</span>
+<span>{%{{{today | shortTimePipe }}}%}</span>
 ```
 
 # ShortDateTime Pipe
 
 ```html
-<span> {{today | shortDateTimePipe }}</span>
+<span>{%{{{today | shortDateTimePipe }}}%}</span>
 ```