Restoring bit on properties and exceptions.

Author: aubertc

source/lectures/oop/properties.md

@@ -259,8 +259,6 @@ The benefit of this notation is that read-only properties can easily be integrat
 + «get» Radius : decimal
 ```
 
-<!--
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 ## Properties and Security
 
 *The following discussion is related to the general topic of [`try-catch-finally` scope](../misc/exceptions#scoping-in-try-catch-finally-statements) but can be read independently.*
@@ -294,9 +292,3 @@ Where the last line indicate that the attribute *was set to `"Forbidden word"`!*
 
 The correct fix is to **first test, then set**, so that an incorrect value would **never be assigned**.
 In the previous example, simply moving `sensibleData = value;` to the end of the `set` would fix this issue.
-
-
-
-```{download="./code/projects/PropertySafety"}
-```
--->