simplify comparison in test

tests/memoryview/memslice.pyx

@@ -1665,7 +1665,7 @@ cdef test_structs_with_arr(FusedStruct array[10]):
         for j in range(3):
             myslice1[i].chars[j] = 97 + j
 
-    if sys.version_info[:2] >= (2, 7) and sys.version_info[:2] < (3, 3):
+    if (2, 7) <= sys.version_info[:2] < (3, 3):
         size1 = <Py_ssize_t>sizeof(FusedStruct)
         size2 = len(builtins.memoryview(myslice1)[0])
         assert size1 == size2, (size1, size2, builtins.memoryview(myslice1).format)