Fix error handling when setting has a parse error

The code was an integer. It needs to be converted to a string in order to be added to other strings.

Contributes to issue CURA-2572.

tests/runtest.py

@@ -235,7 +235,7 @@ class Setting:
             tree = ast.parse(code, "eval")
             compiled = compile(code, self._key, "eval")
         except (SyntaxError, TypeError) as e:
-            print("Parse error in function (" + code + ") for setting", self._key + ":", str(e))
+            print("Parse error in function (" + str(code) + ") for setting", self._key + ":", str(e))
         except IllegalMethodError as e:
             print("Use of illegal method", str(e), "in function (" + code + ") for setting", self._key)
         except Exception as e: