Change formatting

Author: sujithjay

_tour/multiple-parameter-lists.md

@@ -13,53 +13,55 @@ previous-page: nested-functions
 redirect_from: "/tutorials/tour/multiple-parameter-lists.html"
 ---
 
-Methods may define multiple parameter lists. When a method is called with a fewer number of parameter lists, then this will yield a function taking the missing parameter lists as its arguments. This is formally known as [currying](https://en.wikipedia.org/wiki/Currying)
+Methods may define multiple parameter lists. When a method is called with a fewer number of parameter lists, then this will yield a function taking the missing parameter lists as its arguments. This is formally known as [currying](https://en.wikipedia.org/wiki/Currying).
 
 Here is an example, defined in [Traversable](/overviews/collections/trait-traversable.html) trait from Scala collections:
 
 ```
 def foldLeft[B](z: B)(op: (B, A) => B): B
 ```
 
-`foldLeft` applies a binary operator `op` to an initial value `z` and all elements of this traversable, going left to right. Here is an example of its usage:
+`foldLeft` applies a binary operator `op` to an initial value `z` and all elements of this traversable, going left to right. Shown below is an example of its usage. 
+
+Starting with an initial value of 0, `foldLeft` here applies the function `(m, n) => m + n` to each element in the List and the previous accumulated value.
 
 ```tut
 val numbers = List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
 val res = numbers.foldLeft(0)((m, n) => m + n)
 print(res) // 55
 ```
 
-Starting with an initial value of 0, `foldLeft` applies the function `(m, n) => m + n` to each element in the List and the previous accumulated value.
-
 Multiple parameter lists have a more verbose invocation syntax; and hence should be used sparingly. Suggested use cases include:
 
-1. ##### Single functional parameter
-    In case of a single functional parameter, like `op` in the case of `foldLeft` above, multiple parameter lists allow a concise syntax to pass an anonymous function to the method. Without multiple parameter lists, the code would look like this:
-    ```
-    numbers.foldLeft(0, {(m: Int, n: Int) => m + n})
-    ```
-    Note that the use of multiple parameter lists here also allows us to take advantage of Scala type inference to make the code more concise as shown below; which would not be possible for a non-curried definition.
+#### Single functional parameter
+   In case of a single functional parameter, like `op` in the case of `foldLeft` above, multiple parameter lists allow a concise syntax to pass an anonymous function to the method. Without multiple parameter lists, the code would look like this:
+
+```
+numbers.foldLeft(0, {(m: Int, n: Int) => m + n})
+```
 
-    ```
-    numbers.foldLeft(0)(_ + _)
-    ```
+   Note that the use of multiple parameter lists here also allows us to take advantage of Scala type inference to make the code more concise as shown below; which would not be possible in a non-curried definition.
 
-    Also, it allows us to fix the parameter `z` and pass around a partial function and reuse it as shown below:
-    ```tut
-    val numbers = List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
-    val numberFunc = numbers.foldLeft(List[Int]())_
-
-    val squares = numberFunc((xs, x) => xs:+ x*x)
-    print(squares.toString()) // List(1, 4, 9, 16, 25, 36, 49, 64, 81, 100)
+```
+numbers.foldLeft(0)(_ + _)
+```
 
-    val cubes = numberFunc((xs, x) => xs:+ x*x*x)
-    print(cubes.toString()) // List(1, 8, 27, 64, 125, 216, 343, 512, 729, 1000)
-    ```
+   Also, it allows us to fix the parameter `z` and pass around a partial function and reuse it as shown below:
+```tut
+val numbers = List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+val numberFunc = numbers.foldLeft(List[Int]())_
 
-2. ##### Implicit parameters
-    To specify certain parameters in a parameter list as `implicit`, multiple parameter lists should be used. An example of this is:
+val squares = numberFunc((xs, x) => xs:+ x*x)
+print(squares.toString()) // List(1, 4, 9, 16, 25, 36, 49, 64, 81, 100)
+
+val cubes = numberFunc((xs, x) => xs:+ x*x*x)
+print(cubes.toString())  // List(1, 8, 27, 64, 125, 216, 343, 512, 729, 1000)
+```
 
-    ```
-    def execute(arg: Int)(implicit ec: ExecutionContext) = ???
-    ```
+#### Implicit parameters
+   To specify certain parameters in a parameter list as `implicit`, multiple parameter lists should be used. An example of this is:
+
+```
+def execute(arg: Int)(implicit ec: ExecutionContext) = ???
+```