This commit fixes two test cases:
- Whitedlisted chars (success), where the config and expected jsons are
misconfigured;
- Whitelisted chars (invalid). This test was removed. Since stedrr is
preserved with execution in sadnbox, and while stderr contains
"original" bad non-ASCII characters that are filtered, this creates a
paradox. Thus, the test case is removed for now, pending investigation
into this matter.