fixed minor typos

Notes/04_Classes_objects/01_Class.md

@@ -262,7 +262,7 @@ dictionaries. Then compute the total cost:
 >>> sum([s.cost() for s in portfolio])
 44671.15
 >>>
-----
+```
 
 ### Exercise 4.4: Using your class
 

Notes/06_Generators/03_Producers_consumers.md

@@ -59,7 +59,7 @@ Consumer is a for-loop. It gets items and does something with them.
 *producer* → **processing** → **processing** → *consumer*
 
 ```python
-def processing(s:
+def processing(s):
     for item in s:
         ...
         yield newitem
@@ -78,7 +78,7 @@ def producer():
     yield item          # yields the item that is received by the `processing`
     ...
 
-def processing(s:
+def processing(s):
     for item in s:      # Comes from the `producer`
         ...
         yield newitem   # yields a new item