qa: Fix python TypeError in script.py

Github-Pull: #12475
Rebased-From: fa41d68a2e3f2148c3539a11b61ff835e3141c0d

test/functional/test_framework/script.py

@@ -526,11 +526,9 @@ class CScript(bytes):
                     yield CScriptOp(opcode)
 
     def __repr__(self):
-        # For Python3 compatibility add b before strings so testcases don't
-        # need to change
         def _repr(o):
             if isinstance(o, bytes):
-                return b"x('%s')" % hexlify(o).decode('ascii')
+                return "x('%s')" % hexlify(o).decode('ascii')
             else:
                 return repr(o)