message: copy in fmt formatting

Only added // +build ignore at top of file.

There turns out to be too many little interactions and
subtle differences between fmt and message to
comfortably rely on fmt.

Down the road we can look into reusing some
of the fmt code again or moving it to a different
package.

Change-Id: I908ba8b6a8f79f940a7eb4d5581715e2056fded5
Reviewed-on: https://go-review.googlesource.com/45092
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
3 files changed