Added some space before and after operators

Author: alaouimehdi1995

Diff for: sorts/quick_sort.py

@@ -30,13 +30,13 @@ def quick_sort(ARRAY):
     [-45, -5, -2]
     """
     ARRAY_LENGTH=len(ARRAY)
-    if(ARRAY_LENGTH<=1):
+    if( ARRAY_LENGTH <= 1):
         return ARRAY
     else:
-        PIVOT=ARRAY[0]
-        GREATER=[element for element in ARRAY[1:] if element>PIVOT]
-        LESSER=[element for element in ARRAY[1:] if element<=PIVOT]
-        return quick_sort(LESSER)+[PIVOT]+quick_sort(GREATER)
+        PIVOT = ARRAY[0]
+        GREATER = [element for element in ARRAY[1:] if element > PIVOT]
+        LESSER = [element for element in ARRAY[1:] if element <= PIVOT]
+        return quick_sort(LESSER) + [PIVOT] + quick_sort(GREATER)
 
 
 if __name__ == '__main__':