[Client] Fix bug

src/web/app/common/scripts/date-stringify.js

@@ -1,12 +1,12 @@
 module.exports = date => {
 	if (typeof date == 'string') date = new Date(date);
 	return (
-		date.getFullYear()  + '年' + 
-		date.getMonth() + 1 + '月' + 
-		date.getDate()      + '日' +
+		date.getFullYear()    + '年' + 
+		(date.getMonth() + 1) + '月' + 
+		date.getDate()        + '日' +
 		' ' +
-		date.getHours()     + '時' + 
-		date.getMinutes()   + '分' + 
+		date.getHours()       + '時' + 
+		date.getMinutes()     + '分' + 
 		' ' +
 		`(${['日', '月', '火', '水', '木', '金', '土'][date.getDay()]})`
 	);