doc/go1: minor fixes         Fixes issue 3427.         Part of issue 3424.
doc/go1: minor fixes
        Fixes issue 3427.
        Part of issue 3424.

R=golang-dev, bradfitz, r
CC=golang-dev
http://codereview.appspot.com/5959045

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