Add formatting css and reorganize

content/variables/result.md

@@ -2,19 +2,19 @@
 
 The `result` variable is a special variable that serves as an implicit return variable. This is useful because in most cases, the control flow semantics of the `return` statement are unneeded. `result` is initialized with the default value for a given return type, so the following code starts as `0`, before being initialized to `number`:
 
-~~~ nimrod
+``` nimrod
 proc `**`(number, power: int): int =
   result = number
   for i in 1..power:
     result *= number
-~~~
+```
 
 A possible gotcha is declaring a variable called result and expecting it to have the same semantics.
 
-~~~ nimrod
+``` nimrod
 proc unexpected(): int =
   var result = 5
   result += 5
 
 echo unexpected()  # Prints 0, not 10
-~~~
+```