go/doc: collect methods from embedded interfaces

[griesemer]

Summary says it all.

[rsc]

Comment 2:

Is this about interface fields embedded in structs
or interface types embedded in interface type definitions?
In both cases, this is only interesting for embedded
unexported interface types that contain exported methods.
If there is an error embedded in a struct, that should
be hidden (it's an unexported field) but the struct type
should show an Error() string method.  If there is an
error embedded in an interface, that should be shown
as 'error' in the interface definition (and is a separate issue #).
Russ

[rsc]

Comment 3:

Now that error is fixed, I am assuming this is about
type T interface {
     x
}
type x interface {
     M()
}
turning into (in the display)
type T interface {
    M()
}
This doesn't come up in the Go source tree, so I think need not hold up Go 1.

Labels changed: added priority-later, removed priority-triage.

[rsc]

Comment 4:

Labels changed: added go1.1maybe.

[rsc]

Comment 6:

Labels changed: removed go1.1maybe.

[rsc]

Comment 7:

[The time for maybe has passed.]

[rsc]

Comment 8:

Labels changed: added go1.2maybe.

[rsc]

Comment 9:

Labels changed: added feature.

[robpike]

Comment 10:

Labels changed: added go1.3maybe, removed go1.2maybe.

[robpike]

Comment 11:

Labels changed: removed go1.3maybe.

[rsc]

Comment 12:

Labels changed: added go1.3maybe.

[rsc]

Comment 13:

Labels changed: removed feature.

[rsc]

Comment 14:

Labels changed: added release-none, removed go1.3maybe.

[rsc]

Comment 15:

Labels changed: added repo-main.

[griesemer]

Copied from #16043 (closed), comment by @jimmyfrasche: related #6600 #10593 #7823 (more related issues, some fixed).