markdown code formatting

map_form.txt

@@ -1,3 +1,4 @@
+```
 apply {{mustache_name}} to {{pages}}
 	A = /html/head/text()
 	struct B
@@ -15,10 +16,12 @@ end
 ==mustache_name
 blah
 ==end
+```
 
 
 The above should result in the following:
 
+```
 A[]
 B[] --- C
     --- D
@@ -26,8 +29,11 @@ B[] --- C
 	        --- G
 	--- H
 --- I[]
+```
 
 For example, given these query results:
+
+```
 A[] = {a1, a2, a3}
 C = c1
 D[] = {d1, d2}
@@ -35,9 +41,11 @@ F[] = {f1, f2, f3}
 G = g1
 h = h1
 i = i1
+```
 
 then the complete result in tree form shall be:
 
+```
 {
 	A => [a1, a2, a3],
 	B => [
@@ -76,6 +84,7 @@ then the complete result in tree form shall be:
 		}
 	]
 }
+```
 
 Please note that: