doc: change code from inline to blocks

docs/design/type-notation.typ

@@ -1,21 +1,31 @@
 #import "../template.typ": conf
-#show: doc => conf(
-	doc
-)
+#show: conf
 
 = Type/signature notation
 
 Operator signature that takes two unnamed arbitrary numbers of the same type and returns another:
-`Op<T: Num> [ T T ] -> T`
+
+```iowo
+Op<T: Num> [ T T ] -> T
+```
 
 Operator that takes a 32 bit signed integer and returns another:
-`Op i32 -> i32`
+
+```iowo
+Op i32 -> i32
+```
 
 Operator that does the same with a generic arbitrary number type:
-`Op<T: Num> T -> T`
+
+```iowo
+Op<T: Num> T -> T
+```
 
 One dimensional list of 32 bit signed integers:
-`[i32]`
+
+```iowo
+[i32]
+```
 
 Due to inference, you'll also be able to use that in some mathematical operations with integers: