docs(pipes): add information and statement titles

Author: svenson95

docs/src/content/docs/challenges/angular/10-pipe-utility.md

@@ -8,6 +8,8 @@ sidebar:
  order: 202
 ---
 
+## Information
+
 This is the third of three `@Pipe()` challenges, the goal of this series is to master **pipes** in Angular.
 
 Pipes are a very powerful way to transform data in your template. The difference between calling a function and a pipe is that pure pipes are memoized. So they won't be recalculated every change detection cycle if their inputs haven't changed.
@@ -23,10 +25,10 @@ A **impure** pipe is called every change detection cycle.
 
 There are some useful predefined pipes like the DatePipe, UpperCasePipe and CurrencyPipe. To learn more about pipes in Angular, check the API documentation [here](https://angular.io/guide/pipes).
 
-## Information:
+## Statement
 
 In this exercise, you want to access utils functions. Currently you cannot access them directly from your template. The goal is to create a specific pipe for this utils file, where you will need to pass the name of the function you want to call and the needed arguments.
 
-## Constraints:
+## Constraints
 
 - Must be strongly typed

docs/src/content/docs/challenges/angular/8-pipe-pure.md

@@ -24,7 +24,7 @@ A **impure** pipe is called every change detection cycle.
 
 There are some useful predefined pipes like the DatePipe, UpperCasePipe and CurrencyPipe. To learn more about pipes in Angular, check the API documentation [here](https://angular.io/guide/pipes).
 
-## Information
+## Statement
 
 In this exercise, you need to refactor a transform function inside a component, which is called inside your template. The goal is to convert this function to a pipe.
 

docs/src/content/docs/challenges/angular/9-pipe-wrapFn.md

@@ -9,6 +9,8 @@ sidebar:
  order: 103
 ---
 
+## Information
+
 This is the second of three `@Pipe()` challenges, the goal of this series is to master **pipes** in Angular.
 
 Pipes are a very powerful way to transform data in your template. The difference between calling a function and a pipe is that pure pipes are memoized. So they won't be recalculated every change detection cycle if their inputs haven't changed.
@@ -24,7 +26,7 @@ A **impure** pipe is called every change detection cycle.
 
 There are some useful predefined pipes like the DatePipe, UpperCasePipe and CurrencyPipe. To learn more about pipes in Angular, check the API documentation [here](https://angular.io/guide/pipes).
 
-## Information:
+## Statement
 
 In this exercise, you are calling multiple functions inside your template. You can create a specific pipe for each of the functions but this will be too cumbersome.
 The goal is to create a `wrapFn` pipe to wrap your callback function though a pipe. Your function MUST remain inside your component. **`WrapFn` must be highly reusable.**