Docs: Fix typo in `in_category()` description.

Props Kenshino, mbootsman.
Fixes #38363.
Built from https://develop.svn.wordpress.org/trunk@38828


git-svn-id: http://core.svn.wordpress.org/trunk@38771 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/category-template.php

@@ -255,7 +255,7 @@ function get_the_category_list( $separator = '', $parents='', $post_id = false )
 }
 
 /**
- * Check if the current post in within any of the given categories.
+ * Check if the current post is within any of the given categories.
  *
  * The given categories are checked against the post's categories' term_ids, names and slugs.
  * Categories given as integers will only be checked against the post's categories' term_ids.

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38827';
+$wp_version = '4.7-alpha-38828';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.