diff --git a/src/wp-admin/js/inline-edit-post.js b/src/wp-admin/js/inline-edit-post.js
index 8305a8e82b..48e635f23c 100644
--- a/src/wp-admin/js/inline-edit-post.js
+++ b/src/wp-admin/js/inline-edit-post.js
@@ -110,7 +110,7 @@ inlineEditPost = {
 		if ( 'post' === type ) {
 			// support multi taxonomies?
 			tax = 'post_tag';
-			$('tr.inline-editor textarea[name="tax_input['+tax+']"]').suggest( ajaxurl + '?action=ajax-tag-search&tax=' + tax, { delay: 500, minchars: 2, multiple: true, multipleSep: inlineEditL10n.comma + ' ' } );
+			$('tr.inline-editor textarea[name="tax_input['+tax+']"]').suggest( ajaxurl + '?action=ajax-tag-search&tax=' + tax, { delay: 500, minchars: 2, multiple: true, multipleSep: inlineEditL10n.comma } );
 		}
 		$('html, body').animate( { scrollTop: 0 }, 'fast' );
 	},
@@ -195,7 +195,7 @@ inlineEditPost = {
 				textarea.val(terms);
 			}
 
-			textarea.suggest( ajaxurl + '?action=ajax-tag-search&tax=' + taxname, { delay: 500, minchars: 2, multiple: true, multipleSep: inlineEditL10n.comma + ' ' } );
+			textarea.suggest( ajaxurl + '?action=ajax-tag-search&tax=' + taxname, { delay: 500, minchars: 2, multiple: true, multipleSep: inlineEditL10n.comma } );
 		});
 
 		// handle the post status
diff --git a/src/wp-includes/js/jquery/suggest.js b/src/wp-includes/js/jquery/suggest.js
index 60e15c1f8c..87f30122ca 100644
--- a/src/wp-includes/js/jquery/suggest.js
+++ b/src/wp-includes/js/jquery/suggest.js
@@ -240,11 +240,11 @@
 			if ($currentResult) {
 				if ( options.multiple ) {
 					if ( $input.val().indexOf(options.multipleSep) != -1 ) {
-						$currentVal = $input.val().substr( 0, ( $input.val().lastIndexOf(options.multipleSep) + options.multipleSep.length ) );
+						$currentVal = $input.val().substr( 0, ( $input.val().lastIndexOf(options.multipleSep) + options.multipleSep.length ) ) + ' ';
 					} else {
 						$currentVal = "";
 					}
-					$input.val( $currentVal + $currentResult.text() + options.multipleSep);
+					$input.val( $currentVal + $currentResult.text() + options.multipleSep + ' ' );
 					$input.focus();
 				} else {
 					$input.val($currentResult.text());
@@ -294,7 +294,7 @@
 
 		options = options || {};
 		options.multiple = options.multiple || false;
-		options.multipleSep = options.multipleSep || ", ";
+		options.multipleSep = options.multipleSep || ",";
 		options.source = source;
 		options.delay = options.delay || 100;
 		options.resultsClass = options.resultsClass || 'ac_results';
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 4ef33a4a0b..df427182b4 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -476,7 +476,7 @@ function wp_default_scripts( &$scripts ) {
 			'error' => __('Error while saving the changes.'),
 			'ntdeltitle' => __('Remove From Bulk Edit'),
 			'notitle' => __('(no title)'),
-			'comma' => _x( ',', 'tag delimiter' ),
+			'comma' => trim( _x( ',', 'tag delimiter' ) ),
 		) );
 
 		$scripts->add( 'inline-edit-tax', "/wp-admin/js/inline-edit-tax$suffix.js", array( 'jquery' ), false, 1 );