Fix magician in training introduction (#612)

* Fix import example

* Fix link to default imports

concepts/array/about.md

@@ -6,7 +6,7 @@ There is no literal syntax for arrays (like there is for list), so instead the A
 For example, an `Array` with "a", "b" and "c" in it is usually shown as `Array.fromList ["a", "b", "c"]`.
 You will see this on console output, in the debugger, and other places like that.
 
-Unlike `List` which is a [default-import][default import], the `Array` module must be explicity imported, using `import Array` or similar.
+Unlike `List` which is a [default-import][default-imports], the `Array` module must be explicity imported, using `import Array` or similar.
 
 Type annotations for lists can be defined as follows
 
@@ -18,7 +18,7 @@ Array Int --> an array of Int
 Arrays can be defined as follows:
 
 ```elm
-import Array exposing Array
+import Array exposing (Array)
 
 empty : Array Char
 empty = Array.empty

concepts/array/introduction.md

@@ -2,12 +2,12 @@
 
 An [`Array`][array] in Elm is a fast immutable collection of zero or more values of the same type.
 
-Unlike `List` which is a [default-import][default import], the `Array` module must be explicity imported, using `import Array` or similar.
+Unlike `List` which is a [default-import][default-imports], the `Array` module must be explicity imported, using `import Array` or similar.
 
 Arrays can be defined as follows:
 
 ```elm
-import Array exposing Array
+import Array exposing (Array)
 
 empty : Array Char
 empty = Array.empty

exercises/concept/magician-in-training/.docs/introduction.md

@@ -4,12 +4,12 @@
 
 An [`Array`][array] in Elm is a fast immutable collection of zero or more values of the same type.
 
-Unlike `List` which is a [default-import][default import], the `Array` module must be explicity imported, using `import Array` or similar.
+Unlike `List` which is a [default-import][default-imports], the `Array` module must be explicity imported, using `import Array` or similar.
 
 Arrays can be defined as follows:
 
 ```elm
-import Array exposing Array
+import Array exposing (Array)
 
 empty : Array Char
 empty = Array.empty
@@ -33,7 +33,7 @@ oneToFour = Array.push 1 twoToFour --> Array.fromList [ 1, 2, 3, 4 ]
 An element in an Array is retrieved using `Array.get`:
 
 ```elm
-sixSeven = Array.fromList [ 6, 7 ]    
+sixSeven = Array.fromList [ 6, 7 ]
 Array.get 0 sixSeven --> Just 6
 ```