restore white-space characters

ch11.md

@@ -186,47 +186,47 @@ This continual and tedious sorting of types is the price we pay for having mater
 
 ## Exercises
 
-{% exercise %}
+{% exercise %}  
 Write a natural transformation that converts `Either b a` to `Maybe a`
-
-{% initial src="./exercises/ch11/exercise_a.js#L3;" %}
-```js
-// eitherToMaybe :: Either b a -> Maybe a
-const eitherToMaybe = undefined;
-```
-
-
-{% solution src="./exercises/ch11/solution_a.js" %}
-{% validation src="./exercises/ch11/validation_a.js" %}
-{% context src="./exercises/support.js" %}
-{% endexercise %}
-
-
----
+  
+{% initial src="./exercises/ch11/exercise_a.js#L3;" %}  
+```js  
+// eitherToMaybe :: Either b a -> Maybe a  
+const eitherToMaybe = undefined;  
+```  
+  
+  
+{% solution src="./exercises/ch11/solution_a.js" %}  
+{% validation src="./exercises/ch11/validation_a.js" %}  
+{% context src="./exercises/support.js" %}  
+{% endexercise %}  
+  
+  
+---  
 
 
 ```js
 // eitherToTask :: Either a b -> Task a b
 const eitherToTask = either(Task.rejected, Task.of);
 ```
 
-{% exercise %}
+{% exercise %}  
 Using `eitherToTask`, simplify `findNameById` to remove the nested `Either`.
-
-{% initial src="./exercises/ch11/exercise_b.js#L6;" %}
-```js
-// findNameById :: Number -> Task Error (Either Error User)
-const findNameById = compose(map(map(prop('name'))), findUserById);
-```
-
-
-{% solution src="./exercises/ch11/solution_b.js" %}
-{% validation src="./exercises/ch11/validation_b.js" %}
-{% context src="./exercises/support.js" %}
-{% endexercise %}
-
-
----
+  
+{% initial src="./exercises/ch11/exercise_b.js#L6;" %}  
+```js  
+// findNameById :: Number -> Task Error (Either Error User)  
+const findNameById = compose(map(map(prop('name'))), findUserById);  
+```  
+  
+  
+{% solution src="./exercises/ch11/solution_b.js" %}  
+{% validation src="./exercises/ch11/validation_b.js" %}  
+{% context src="./exercises/support.js" %}  
+{% endexercise %}  
+  
+  
+---  
 
 
 As a reminder, the following functions are available in the exercise's context:
@@ -236,20 +236,20 @@ split :: String -> String -> [String]
 intercalate :: String -> [String] -> String
 ```
 
-{% exercise %}
+{% exercise %}  
 Write the isomorphisms between String and [Char].
-
-{% initial src="./exercises/ch11/exercise_c.js#L8;" %}
-```js
-// strToList :: String -> [Char]
-const strToList = undefined;
-
-// listToStr :: [Char] -> String
-const listToStr = undefined;
-```
-
-
-{% solution src="./exercises/ch11/solution_c.js" %}
-{% validation src="./exercises/ch11/validation_c.js" %}
-{% context src="./exercises/support.js" %}
-{% endexercise %}
+  
+{% initial src="./exercises/ch11/exercise_c.js#L8;" %}  
+```js  
+// strToList :: String -> [Char]  
+const strToList = undefined;  
+  
+// listToStr :: [Char] -> String  
+const listToStr = undefined;  
+```  
+  
+  
+{% solution src="./exercises/ch11/solution_c.js" %}  
+{% validation src="./exercises/ch11/validation_c.js" %}  
+{% context src="./exercises/support.js" %}  
+{% endexercise %}