if _, err := parser.ParseFile(fset, "", res, parser.ParseComments); err != nil {
		return nil, fmt.Errorf("re-parse: %s\n%s", err, buf.Bytes())
	}

	return res, nil
}

// lineAt returns the line in text starting at offset offs.
func lineAt(text []byte, offs int) []byte {
	i := offs
	for i < len(text) && text[i] != '\n' {
		i++
	}
	return text[offs:i]
}

// checkEqual compares a and b.

Costinescu, Andrei Nigmatulin, Andrew Erlichson, Andrew Myers, Andrew Stepanov,
Androbin, AngryPowman, Anish Shah, Anton Daitche, Artsiom Chapialiou, asdf2014,
Aseem Raj Baranwal, Ash Hall, Bart Kiers, Batchu Venkat Vishal, ben, Ben
Barsdell, Bill Piel, Carl Thomé, Catalin Voss, Changming Sun, Chengzhi Chen, Chi
Zeng, Chris Antaki, Chris Donahue, Chris Oelmueller, Chris Tava, Clayne Robison,