SSE client trims all whitespace from the data part, but the spec says only trim a single optional space character

[basfp]

In sse.go function trimHeader calls data = bytes.TrimSpace(data), which removes all whitespace left and right of the data value.

But the spec says:

If value starts with a U+0020 SPACE character, remove it from value.

My service sends data: lines where the data can start with whitespace, which should be preserved. E.g.

data: word (two spaces, one from the SSE format and one as part of the value).