Make real JSON in arb (#29463)

packages/flutter_localizations/lib/src/l10n/cupertino_en.arb

@@ -14,22 +14,22 @@
 
   "datePickerDateOrder": "mdy",
   "@datePickerDateOrder": {
-    "description": "The standard order for the locale to arrange day, month and year in a date. Options are dmy, mdy, ymd and ydm.",
+    "description": "The standard order for the locale to arrange day, month and year in a date. Options are dmy, mdy, ymd and ydm."
   },
 
   "datePickerDateTimeOrder": "date_time_dayPeriod",
   "@datePickerDateTimeOrder": {
-    "description": "The standard order for the locale to date, time and am/pm in a datetime. Options are date_time_dayPeriod, date_dayPeriod_time, time_dayPeriod_date and dayPeriod_time_date where 'dayPeriod' is am/pm.",
+    "description": "The standard order for the locale to date, time and am/pm in a datetime. Options are date_time_dayPeriod, date_dayPeriod_time, time_dayPeriod_date and dayPeriod_time_date where 'dayPeriod' is am/pm."
   },
 
   "anteMeridiemAbbreviation": "AM",
   "@anteMeridiemAbbreviation": {
-    "description": "The abbreviation for ante meridiem (before noon) shown in the time picker.",
+    "description": "The abbreviation for ante meridiem (before noon) shown in the time picker."
   },
 
   "postMeridiemAbbreviation": "PM",
   "@postMeridiemAbbreviation": {
-    "description": "The abbreviation for post meridiem (after noon) shown in the time picker.",
+    "description": "The abbreviation for post meridiem (after noon) shown in the time picker."
   },
 
   "alertDialogLabel": "Alert",
@@ -74,4 +74,5 @@
   "selectAllButtonLabel": "Select All",
   "@selectAllButtonLabel": {
     "description": "The label for select-all buttons and menu items."
-  },
+  }
+}