removed trailing whitespace in Doxygen files

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52634 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/doxygen/overviews/stream.h

@@ -94,7 +94,7 @@ if (in_stream.Read(data, nb_datas).LastError() != wxSTREAM_NOERROR) {
 // You can also get the last number of bytes REALLY put into the buffer.
 size_t really_read = in_stream.LastRead();
 
-// Ok, moves to the beginning of the stream. SeekI returns the last position 
+// Ok, moves to the beginning of the stream. SeekI returns the last position
 // in the stream counted from the beginning.
 off_t old_position = in_stream.SeekI(0, wxFromBeginning);