Minor tweaks.
Minor tweaks.

The text changes are trivial and may be ignored, but there are
two code corrections.

R=r, rsc
CC=go-dev
http://go/go-review/1024045

tianon/debian-golang,dsriram/golang,h8liu/golang,tianon/debian-golang,gnanderson/go,ssrl/go,tv42/old-go,ssrl/go,gnanderson/go,gnanderson/go,nightlyone/golang,ssrl/go,bdwalton/debian-golang,dsriram/golang,nightlyone/golang,bdwalton/debian-golang,tianon/debian-golang,apparentlymart/golang,dsriram/golang,dsriram/golang,bdwalton/debian-golang,bdwalton/debian-golang,nightlyone/golang,ssrl/go,pombredanne/go-deleteme,apparentlymart/golang,h8liu/golang,apparentlymart/golang,gnanderson/go,gnanderson/go,pombredanne/go-deleteme,h8liu/golang,bdwalton/debian-golang,bdwalton/debian-golang,pombredanne/go-deleteme,h8liu/golang,gnanderson/go,apparentlymart/golang,apparentlymart/golang,h8liu/golang,nightlyone/golang,apparentlymart/golang,ssrl/go,nightlyone/golang,bdwalton/debian-golang,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,tianon/debian-golang,nightlyone/golang,pombredanne/go-deleteme,dsriram/golang,tv42/old-go,pombredanne/go-deleteme,tianon/debian-golang,h8liu/golang,gnanderson/go,tv42/old-go,nightlyone/golang,tv42/old-go,tianon/debian-golang,tianon/debian-golang,h8liu/golang,dsriram/golang,ssrl/go,tianon/debian-golang,bdwalton/debian-golang,apparentlymart/golang,tv42/old-go,ssrl/go,dsriram/golang,pombredanne/go-deleteme