JSHint Errors

gistfile1.txt

function(config) {
  // JSHint error on next line: "Line breaking error 'return'. Following line: "Bad escapement."
  return 'https://accounts.google.com/o/oauth2/auth?\
client_id={{CLIENT_ID}}&\
redirect_uri={{REDIRECT_URI}}&\
scope={{API_SCOPE}}&\
response_type=code'
        .replace('{{CLIENT_ID}}', config.clientId)
        .replace('{{REDIRECT_URI}}', this.redirectURL(config))
        .replace('{{API_SCOPE}}', config.apiScope);
}