compress/gzip: API

[rsc]

I can't imagine what error NewWriter could return.
It should probably not return one.

The doc comment on Decompressor talks about receiving
a (zero, nil) from Read.  Surely it means (0, io.EOF).

[rsc]

Comment 1:

Also, the BUGS section talks about non-UTF-8 names not mapping properly.  Instead of
saying "don't properly map" it should say what they do.  For example (if this is true)
The Comment and Name header fields are UTF-8 strings, but the underlying storage uses
Latin-1.  Non-Latin-1 characters in the strings are stored as ? characters.

[nigeltao]

Comment 2:

Owner changed to @nigeltao.

[nigeltao]

Comment 3:

This issue was closed by revision cc9ed44.

Status changed to Fixed.