Docs: Correct $format default in get_next_post_link() and next_post_link().

Follow-up to [37254].

Props ishihara-takashi, sabernhardt, khokansardar, mindctrl, SergeyBiryukov.
Fixes #65541.

git-svn-id: https://develop.svn.wordpress.org/trunk@62565 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/link-template.php

@@ -2291,7 +2291,7 @@ function previous_post_link( $format = '« %link', $link = '%title', $in_sa
  *
  * @since 3.7.0
  *
- * @param string       $format         Optional. Link anchor format. Default '« %link'.
+ * @param string       $format         Optional. Link anchor format. Default '%link »'.
  * @param string       $link           Optional. Link permalink format. Default '%title'.
  * @param bool         $in_same_term   Optional. Whether link should be in the same taxonomy term.
  *                                     Default false.
@@ -2311,7 +2311,7 @@ function get_next_post_link( $format = '%link »', $link = '%title', $in_sa
  *
  * @see get_next_post_link()
  *
- * @param string       $format         Optional. Link anchor format. Default '« %link'.
+ * @param string       $format         Optional. Link anchor format. Default '%link »'.
  * @param string       $link           Optional. Link permalink format. Default '%title'.
  * @param bool         $in_same_term   Optional. Whether link should be in the same taxonomy term.
  *                                     Default false.