ICU filter doesn't work properly in some situations

[Mart17]

"This {{type | icu: 'artwork-book'}}..." won't work, because after converting it to string it'll give
'This {{type | icu: ' 'artwork-book' '}}' (two single quotes instead of one + it changes some double quotes to single ones) and Liquid isn't capable of recognizing this. Not sure why but when it has only symbols, or whitespace but no characters then it works. So this ".. {{type | icu: 'artwork-book'}}" will work. Also when I swap string quotes 'This {{type | icu: "artwork-book"}}' it works. I assume this is only related for /locales, because /tokens will be contain only keys-tokens without additional text like blabla: "{{bla1}}, {{bla2}}".

This doesn't even have to be a problem, it depends how the structure of those yaml contents in /locales will look like.