Fixed code blocks

Contributing.md

@@ -181,26 +181,26 @@ Coding Conventions
 * **ALWAYS** place a single-statement control flow body, for control statements such as `if`, `else`, `for`, `foreach`,
   on a separate line, with consistent indentation.
   
-  Yes:
+Yes:
 
-        ```python
+```python
-        if somethingTrue:
+if somethingTrue:
     Things_we_then_do()
-        ```
+```
   
-  No:
+No:
 
-        ```python
+```python
-        if somethingTrue: One_thing_we_do()
+if somethingTrue: One_thing_we_do()
-        ```
+```
   
   Yes, some existing code still flouts this rule.
 
 * **Always** use Line breaks after scope changes. It makes reading code far easier
 
-  Yes:
+Yes:
 
-      ```python
+```python
   if True:
     do_something()
 
@@ -208,16 +208,17 @@ Coding Conventions
     raise UniverseBrokenException()
 
   return
-      ```
+```
-  No:
 
-      ```python
+No:
+
+```python
   if True:
     do_something()
   else:
     raise UniverseBrokenException()
   return
-      ```
+```
 
 
 * Going forwards please do place [type hints](https://docs.python.org/3/library/typing.html) on the declarations of your functions, both their arguments and return