How to use

trim

function

in

StringChain

function excludeInterface(name, content) {
 var without = _.curry(function (name, content) {
  return !_.includes(content, name);
 });

 return _.chain(content)
  .split('\n\n')
  .filter(without(name))
  .join('\n\n').trim();
}

function replaceInterface(name, content, interfaceDescription) {
 var replaceFn = interfaceDescription.dhcp? formatDhcpConfig : formatConfig;
 return excludeInterface(name, content).trim() + '\n\n' + replaceFn(_.extend({
  name: name
 }, interfaceDescription)) + '\n';
}