You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: version.go
    path of file: ./repos/kubeedge/vendor/google.golang.org/api/internal/gensupport
    
    the code of the file until where you have to start completion: // Copyright 2020 Google LLC. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package gensupport

import (
	"runtime"
	"strings"
	"unicode"
)

// GoVersion returns the Go runtime version. The returned string
// has no whitespace.
func GoVersion() string {
	return goVersion
}

var goVersion = goVer(runtime.Version())

const develPrefix = "devel +"

func goVer(s string
    
func goVer(s string) string {
	if strings.HasPrefix(s, develPrefix) {
		s = s[len(develPrefix):]
		if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 {
			s = s[:p]
		}
		return s
	}

	if strings.HasPrefix(s, "go1") {
		s = s[2:]
		var prerelease string
		if p := strings.IndexFunc(s, notSemverRune); p >= 0 {
			s, prerelease = s[:p], s[p:]
		}
		if strings.HasSuffix(s, ".") {
			s += "0"
		} else if strings.Count(s, ".") < 2 {
			s += ".0"
		}
		if prerelease != "" {
			s += "-" + prerelease
		}
		return s
	}
	return ""
}