It looks like the tip is working correctly and there has been a line trims the extra whitespace in the pre block at https://github.com/golang/tools/blame/master/godoc/godoc.go#L463.

@broady, are we running an old version of godoc on the website?

Nope, I deployed it yesterday from release-branch.go1.7

Hi there. I see this bug still expressed on golang.org but not on godoc.org:

https://godoc.org/go/printer#ex-Fprint

(I had naïvely assumed they used the same code to generate the docs and just differed in the stylesheets, but it seems that's not the case.)

Mmh, I honestly don't remember if godoc.org was affected when I opened this issue; I focused on golang.org because that's where I saw the issue first.

This will be fixed when Go 1.8 rolls out to golang.org. (~1 March)