bytes: Change Compare example to be consistent with sort.Search's.

R=rsc, adg
CC=golang-dev
https://codereview.appspot.com/7057049

Committer: Russ Cox <rsc@golang.org>
bytes: Fix missing godoc punctuation.

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/7067047

Committer: Russ Cox <rsc@golang.org>
      doc: two minor edits to contribute.html

- Missing parenthesis
- Fix bad phrasing

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/7063048

Committer: Russ Cox <rsc@golang.org>
os: document that Exit does not run deferred calls

Fixes issue 4101.

R=dsymonds, rsc
CC=golang-dev
https://codereview.appspot.com/7065048
cmd/gc, cmd/ld: rename -b to -race

There's no b in race detector.
The new flag matches the one in the go command
(go test -race math).

R=golang-dev, dsymonds
CC=golang-dev
https://codereview.appspot.com/7072043