strconv: FormatFloat handles prec differently from the doc with fmt='g' #25082
Description
What version of Go are you using (go version)?
go version go1.10.1 linux/amd64
Does this issue reproduce with the latest release?
Yes
What operating system and processor architecture are you using (go env)?
GOARCH="amd64"
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
What did you do?
fmt.Println(strconv.FormatFloat(1.5, 'g', 6, 64))
https://play.golang.org/p/WRHc89mjuSG
What did you expect to see?
1.50000
https://golang.org/pkg/strconv/#FormatFloat says:
The precision prec controls the number of digits […]. For 'g' and 'G' it is the total number of digits.
I gave prec=6, so the total number of digits should be 6.
What did you see instead?
1.5
The total number of digits is 2.