Updated PolygonPatternSymbolizer (markdown)

PolygonPatternSymbolizer.md

@@ -21,24 +21,26 @@
 
 #### XML
 
-    #!xml
+```xml
     <PolygonPatternSymbolizer width="16" height="16" type="png" file="/path/to/icon.png"/>
+```
 
 #### Python
 
-
-    #!python
+```python
     p = PolygonPatternSymbolizer('/path/to/icon.png','png',10,10) # file, type, width, height
+```
 
 mapnik2:
 
-
-    #!python
+```python
     p = PolygonPatternSymbolizer(PathExpression('/path/to/icon.png'))
+```
 
 #### C++
 
 
-    #!cpp
+```cpp
     ruly_type rule;
-    rule.append(polygon_pattern_symbolizer("path/to/icon.png", "png", 20, 20)); // file, type, width, height
+    rule.append(polygon_pattern_symbolizer("path/to/icon.png", "png", 20, 20)); // file, type, width, height
+```