Use UTF-8 for all non-ASCII characters in the sources.

Avoid mixing Latin-1, UTF-8 and Mac Roman (?) encodings in different source
files, use UTF-8 everywhere.

See #11116.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61961 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/datetime.h

@@ -247,7 +247,7 @@ public:
         // adoption of the Gregorian calendar (see IsGregorian())
         //
         // All data and comments taken verbatim from "The Calendar FAQ (v 2.0)"
-        // by Claus T<EFBFBD>ndering, http://www.pip.dknet.dk/~c-t/calendar.html
+        // by Claus Tøndering, http://www.pip.dknet.dk/~c-t/calendar.html
         // except for the comments "we take".
         //
         // Symbol "->" should be read as "was followed by" in the comments