Merge pull request #75 from OmarTahoun/master

[FIX: #71] wrong return value for is_upper_case("a3@$")

snippets/is_upper_case.md

@@ -11,6 +11,6 @@ def is_upper_case(string):
 
 ```python
 is_upper_case('ABC') # True
-is_upper_case('a3@$') # True
+is_upper_case('a3@$') # False
 is_upper_case('aB4') # False
-```
+```