Update CmdCalendar.cpp

Converted some tabs to spaces and added braces to a for loop.

src/commands/CmdCalendar.cpp

@@ -559,6 +559,7 @@ std::string CmdCalendar::renderMonths (
         if (Context::getContext ().config.get ("calendar.holidays") != "none")
         {
           for (auto& hol : Context::getContext ().config)
+          {
             if (hol.first.substr (0, 8) == "holiday.")
             {
               if (hol.first.substr (hol.first.size () - 4) == "date")
@@ -582,6 +583,7 @@ std::string CmdCalendar::renderMonths (
               }
             }
           }
+        }
 
         // colorize today
         if (today.sameDay (date))