Updating calendar documentation (#196)

* Updating calendar documentation

Updating regarding PR MagicMirrorOrg/MagicMirror#3166

* Update calendar.md

fix typo

* Update calendar.md

fix description

modules/calendar.md

@@ -68,6 +68,7 @@ The following properties can be configured:
 | `limitDaysNeverSkip`                  | If this property is set to true, every event for every day will be shown regardless of if the day on has a single full day event or not.<br><br> **Default value:** `false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `flipDateHeaderTitle`                 | This property deterines if the title for the date header in the `dateheaders` time format will align to the left or right. <br><br> **Possible values:** `true` (right) or `false` (left) <br> **Default value:** `false` (left)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
 | `hideTime`                            | If this property is set to true the time portion on relative times will be hidden.<br><br> **Default value:** `false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
+| `hideDuplicates` | If this property is set to true, entries with the same title, starting and ending time will be hidden.<br><br> **Default value:** `true` |
 | `showTimeToday`                       | If this property is set to true, the event time will be displayed for same-day events even when relative display is being used.<br><br> **Default value:** `false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
 | `colored`<br>_(deprecated)_           | If this property is set to true, an individual color can be set for each calendar. <br><br> **Default value:** `false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
 | `coloredSymbolOnly`<br>_(deprecated)_ | If this property is set to true, an individual symbol color can be set for each calendar, not the whole line. This is only applicable when `colored` is also enabled.<br><br> **Default value:** `false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |