go/analysis/doc: add  doc about suggested_fixes.
go/analysis/doc: add  doc about suggested_fixes.

Change-Id: Ie0c2ef42665312e679feb34202588a9dd78bbfd2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/183262
Run-TryBot: Michael Matloob <4562438b12c14e81a47550acde616ff328a909f8@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Ian Cottrell <52376736e5e84615ec49f9c1843b8acc178b1d8d@google.com>

golang/tools,golang/tools,golang/tools,golang/tools,golang/tools