go/printer: think about format for chained calls

[gopherbot]

by tshaked@google.com:

var ss = s.NewConfig().
    User("t").
    DataLayout(
    sssssss.NewDataLayout().
        BaseDir("/c").
        StartDate("2013-01-01").
        Sh(
        s.PN{
            P: 1,
            N: 10}).
        H(7).
        Hon(0.01))

[cznic]

Comment 1:

What is the proposed formatting?

[griesemer]

Comment 2:

This issue is a reminder for me to look at some formatting issues when chaining method
calls. No proposals have been made.

Owner changed to @griesemer.

Status changed to Thinking.

[rsc]

Comment 3:

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

[rsc]

Comment 5:

Labels changed: added repo-main.

[rsc]

Comment 6:

Adding Release=None to all Priority=Someday bugs.

Labels changed: added release-none.