tree 08b91cd61e130ac0e2107a28aad7f00c8487fddd
parent b6f3111d8e460de35a5e5570bd784919fc30c5f8
author Fabian Meumertzheim <fabian@meumertzhe.im> 1666620859 -0700
committer Copybara-Service <copybara-worker@google.com> 1666620922 -0700

Check type of `lines` parameter in `ScratchFile` Python test helper

Since strings are iterable in Python, accidentally passing a string to the `ScratchFile` test helper ends up writing one character per line, which leads to very confusing error messages.

Closes #16519.

PiperOrigin-RevId: 483372166
Change-Id: Ic01d9a1c1ebd7ad549b1275d3eae6666b4ef9abf