Docs: Correct spelling and capitalization in `wp-includes/load.php`:

* Fix typo in `is_blog_admin()` description.
* Capitalize PHP correctly in `enable_wp_debug_mode_checks` filter description.
* Capitalize XML correctly in `wp_is_xml_request()` return value description.

Props stevegrunwell.
Fixes #48771.
Built from https://develop.svn.wordpress.org/trunk@46759


git-svn-id: http://core.svn.wordpress.org/trunk@46559 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/load.php

@@ -312,7 +312,7 @@ function wp_debug_mode() {
 	 *
 	 * This filter runs before it can be used by plugins. It is designed for
 	 * non-web run-times. Returning false causes the `WP_DEBUG` and related
-	 * constants to not be checked and the default php values for errors
+	 * constants to not be checked and the default PHP values for errors
 	 * will be used unless you take care to update them yourself.
 	 *
 	 * @since 4.6.0
@@ -990,7 +990,7 @@ function is_admin() {
 }
 
 /**
- * Whether the current request is for a site's admininstrative interface.
+ * Whether the current request is for a site's administrative interface.
  *
  * e.g. `/wp-admin/`
  *
@@ -1527,7 +1527,7 @@ function wp_is_jsonp_request() {
  *
  * @since 5.2.0
  *
- * @return bool True if Accepts or Content-Type headers contain xml, false otherwise.
+ * @return bool True if `Accepts` or `Content-Type` headers contain XML, false otherwise.
  */
 function wp_is_xml_request() {
 	$accepted = array(

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-46758';
+$wp_version = '5.4-alpha-46759';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.