go/printer: output tuning for gofix
go/printer: output tuning for gofix

If braces don't have position information for a composite
literal, don't assume alignment of key:value pairs under
the (wrong) assumption that there may be multiple lines.

R=rsc
CC=golang-dev
http://codereview.appspot.com/4297043

gnanderson/go,pombredanne/go-deleteme,tv42/old-go,ssrl/go,tv42/old-go,tv42/old-go,dsriram/golang,ssrl/go,gnanderson/go,ssrl/go,ssrl/go,pombredanne/go-deleteme,ssrl/go,apparentlymart/golang,tv42/old-go,gnanderson/go,dsriram/golang,pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,dsriram/golang,gnanderson/go,gnanderson/go,dsriram/golang,gnanderson/go,apparentlymart/golang,pombredanne/go-deleteme,apparentlymart/golang,apparentlymart/golang,ssrl/go,dsriram/golang,pombredanne/go-deleteme,tv42/old-go,dsriram/golang,gnanderson/go,dsriram/golang,tv42/old-go,apparentlymart/golang,apparentlymart/golang,ssrl/go