// some lines from a comment block - does format correctly.
	fixed := false
	for _, g := range f.Comments {
		sawGoBuild := false
		for i, c := range g.List {
			if strings.HasPrefix(c.Text, "//go:build ") {
				sawGoBuild = true
			}
			if sawGoBuild && strings.HasPrefix(c.Text, "// +build ") {
				g.List = g.List[:i]
				fixed = true
				break
			}
		}
	}

	return fixed