:bug: fix type error test for Toploop
:bug: fix type error test for Toploop

Maybe error messages are colorized:

```
expected: [["Compile_error","Error: This expression has type bool but an expression was expected of type\n         int"]]
but got: [["Compile_error","\u001b[1;31mError\u001b[0m: This expression has type bool but an expression was expected of type\n         int\n"]]
```

akabe/ocaml-jupyter,akabe/ocaml-jupyter