encoding/csv: API

[rsc]

Document what ReadAll does on success.
Does it return err == io.EOF, or does it suppress
it like ioutil.ReadAll does?

[robpike]

Comment 1:

Owner changed to @robpike.

Status changed to Started.

[robpike]

Comment 2:

This issue was closed by revision 90d43ad.

Status changed to Fixed.