Index: wp-includes/post-template.php
===================================================================
--- wp-includes/post-template.php	(revision 13389)
+++ wp-includes/post-template.php	(working copy)
@@ -1006,7 +1006,7 @@
  * Whether currently in a page template.
  *
  * This template tag allows you to determine if you are in a page template.
- * You can optional provide a template name and then the check will be
+ * You can optionally provide a template name and then the check will be
  * specific to that template.
  *
  * @since 2.5.0
Index: wp-includes/general-template.php
===================================================================
--- wp-includes/general-template.php	(revision 13389)
+++ wp-includes/general-template.php	(working copy)
@@ -167,7 +167,7 @@
 /**
  * Display the Log In/Out link.
  *
- * Displays a link, which allows the user to navigate to the Log In page to log in
+ * Displays a link, which allows users to navigate to the Log In page to log in
  * or log out depending on whether they are currently logged in.
  *
  * @since 1.5.0
Index: wp-includes/deprecated.php
===================================================================
--- wp-includes/deprecated.php	(revision 13389)
+++ wp-includes/deprecated.php	(working copy)
@@ -1255,7 +1255,7 @@
  * @see get_comment()
  *
  * @param int $comment_ID The ID of the comment
- * @param int $no_cache Whether to use the cache (casted to bool)
+ * @param int $no_cache Whether to use the cache (cast to bool)
  * @param bool $include_unapproved Whether to include unapproved comments
  * @return array The comment data
  */
@@ -2411,4 +2411,4 @@
 		do_action( 'updated_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );
 
 	return true;
-}
\ No newline at end of file
+}
Index: wp-admin/includes/misc.php
===================================================================
--- wp-admin/includes/misc.php	(revision 13389)
+++ wp-admin/includes/misc.php	(working copy)
@@ -128,7 +128,7 @@
 	$home_path = get_home_path();
 	$htaccess_file = $home_path.'.htaccess';
 
-	// If the file doesn't already exists check for write access to the directory and whether we have some rules.
+	// If the file doesn't already exist check for write access to the directory and whether we have some rules.
 	// else check for write access to the file.
 	if ((!file_exists($htaccess_file) && is_writable($home_path) && $wp_rewrite->using_mod_rewrite_permalinks()) || is_writable($htaccess_file)) {
 		if ( got_mod_rewrite() ) {