diff --git a/wp-admin/includes/class-wp-filesystem-base.php b/wp-admin/includes/class-wp-filesystem-base.php
index 08dfabddd0..5192c06d38 100644
--- a/wp-admin/includes/class-wp-filesystem-base.php
+++ b/wp-admin/includes/class-wp-filesystem-base.php
@@ -317,7 +317,7 @@ class WP_Filesystem_Base {
 			 */
 			if ( isset($files[ $key ]) ){
 
-				// Lets try that folder:
+				// Let's try that folder:
 				$newdir = trailingslashit(path_join($base, $key));
 				if ( $this->verbose )
 					printf( "\n" . __('Changing to %s') . "<br/>\n", $newdir );
diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index 9f76f2e5a4..690feebbec 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -707,7 +707,7 @@ class Plugin_Upgrader extends WP_Upgrader {
 			return $source;
 
 		$working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
-		if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, lets not prevent installation.
+		if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, let's not prevent installation.
 			return $source;
 
 		// Check the folder contains at least 1 valid plugin.
@@ -850,7 +850,7 @@ class Theme_Upgrader extends WP_Upgrader {
 			return $install_result;
 		}
 
-		// We don't have the parent theme, lets install it
+		// We don't have the parent theme, let's install it.
 		$api = themes_api('theme_information', array('slug' => $theme_info->get('Template'), 'fields' => array('sections' => false, 'tags' => false) ) ); //Save on a bit of bandwidth.
 
 		if ( ! $api || is_wp_error($api) ) {
@@ -1095,7 +1095,7 @@ class Theme_Upgrader extends WP_Upgrader {
 
 		// Check the folder contains a valid theme
 		$working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
-		if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, lets not prevent installation.
+		if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, let's not prevent installation.
 			return $source;
 
 		// A proper archive should have a style.css file in the single subdirectory
@@ -2101,7 +2101,7 @@ class WP_Automatic_Updater {
 			$upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
 		}
 
-		// Core doesn't output this, so lets append it so we don't get confused.
+		// Core doesn't output this, so let's append it so we don't get confused.
 		if ( 'core' == $type ) {
 			if ( is_wp_error( $upgrade_result ) ) {
 				$skin->error( __( 'Installation Failed' ), $upgrade_result );
diff --git a/wp-includes/class-wp.php b/wp-includes/class-wp.php
index 8cdeac47ac..f8b3f82753 100644
--- a/wp-includes/class-wp.php
+++ b/wp-includes/class-wp.php
@@ -205,7 +205,7 @@ class WP {
 						preg_match("#^$match#", urldecode($request_match), $matches) ) {
 
 						if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
-							// this is a verbose page match, lets check to be sure about it
+							// This is a verbose page match, let's check to be sure about it.
 							if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
 						 		continue;
 						}
diff --git a/wp-includes/rewrite.php b/wp-includes/rewrite.php
index db66ff6617..9bc167f08f 100644
--- a/wp-includes/rewrite.php
+++ b/wp-includes/rewrite.php
@@ -363,7 +363,7 @@ function url_to_postid($url) {
 		if ( preg_match("#^$match#", $request_match, $matches) ) {
 
 			if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
-				// this is a verbose page match, lets check to be sure about it
+				// This is a verbose page match, let's check to be sure about it.
 				if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
 					continue;
 			}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 66ca745779..73f2608c17 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-beta2-30702';
+$wp_version = '4.1-beta2-30703';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.