Corrected the ground truth in MINIMUM_ROTATIONS_REQUIRED_GET_STRING tests

data/evaluation/geeks_for_geeks_successful_test_scripts/python/MINIMUM_ROTATIONS_REQUIRED_GET_STRING.py

@@ -8,7 +8,7 @@ def f_gold ( str ) :
     tmp = str + str
     n = len ( str )
     for i in range ( 1 , n + 1 ) :
-        substring = tmp [ i : n ]
+        substring = tmp [ i : i + n ]
         if ( str == substring ) :
             return i
     return n