* to be, but doing so would change the case of i18n message keys).
* @param string $displayName For backwards-compatibility with old skin loading system. This is
* the text used as skin's human-readable name when the 'skinname-<skin>' message is not
- * available. It should be the same as the skin name provided in $wgExtensionCredits.
+ * available. It should be the same as the skin name provided in $wgExtensionCredits.
* @param callable $callback Callback that takes the skin name as an argument
* @throws InvalidArgumentException If an invalid callback is provided
*/