Update src/sage/rings/integer_ring.pyx

Co-authored-by: Travis Scrimshaw <clfrngrown@aol.com>

Author: GiacomoPope

src/sage/rings/integer_ring.pyx

@@ -1575,7 +1575,7 @@ cdef class IntegerRing_class(PrincipalIdealDomain):
         return pAdicValuation(self, p)
 
     def from_bytes(self, input_bytes, byteorder="big", is_signed=False):
-        """
+        r"""
         Return the integer represented by the given array of bytes.
 
         Internally relies on the python ``int.from_bytes()`` method.