lib/path.js
function diff(rootpath, src) {
  return _.isString(rootpath) && _.isString(src) ?
    src.replace(rootpath, '').split(path.sep).join('/') : ''
}
function diff(rootpath, src) {
  return _.isString(rootpath) && _.isString(src) ?
    src.replace(rootpath, '').split(path.sep).join('/') : ''
}
function diff ( rootpath , src ) { return _ . isString ( rootpath ) && _ . isString ( src ) ? src . replace ( rootpath , '' ) . split ( path . sep ) . join ( '/' ) : '' }
returns forward-slashed rel path (only use for better visual logging)
returns forward - slashed rel path ( only use for better visual logging )