Fix formatter

Author: JamesMcIntosh

lib/src/date_time_formatter.dart

@@ -24,14 +24,14 @@ class DateTimeFormatter {
     return '';
   }
 
-  /// Check if the date format is for day(contain y、M、d、E) or not.
+  /// Check if the date format is for day(contain y, M, d, E) or not.
   static bool isDayFormat(String format) {
     return format.contains(RegExp(r'[yMdE]'));
   }
 
-  /// Check if the date format is for time(contain H、m、s) or not.
+  /// Check if the date format is for time(contain H, h, m, s, a) or not.
   static bool isTimeFormat(String format) {
-    return format.contains(RegExp(r'[Hms]'));
+    return format.contains(RegExp(r'[Hhmsa]'));
   }
 
   /// Split date format to array.

lib/src/widget/time_picker_widget.dart

@@ -308,7 +308,7 @@ class _TimePickerWidgetState extends State<TimePickerWidget> {
     }
   }
 
-  /// change the selection of hour picker
+  /// change the selection of minute picker
   void _changeMinuteSelection(int index) {
     // TODO: this looks like it would break date ranges but not taking into account _minuteRange.first
     int value = index * _minuteDivider;