Header list "get" return type is unclear

[domenic]

https://fetch.spec.whatwg.org/commit-snapshots/086e35f3d2b2fd1961d648f2df9b4a350fff707f/#terminology-headers

Return the values of all headers in list whose name is a byte-case-insensitive match for name, separated from each other by 0x2C 0x20, in order.

I think this is attempting to concatenate everything into a single byte sequence? But at first I read it as returning a list. Maybe using the return-value-stating form of https://infra.spec.whatwg.org/#algorithm-declaration would help.