Forgot my own review comment for Bug 324417 :-(

calendar/lightning/content/messenger-overlay-sidebar.js

@@ -158,7 +158,7 @@ function goToToday()
     // set the current date in the minimonth control;
     // note, that the current view in the calendar-view-box is automatically updated
     var currentDay = today();
-    document.getElementById( "ltnMinimonth" ).value = currentDay.jsDate;
+    document.getElementById("ltnMinimonth").value = currentDay.jsDate;
 }
 
 function selectedCalendarPane(event)