Fix premature truncation of brief descriptions in Doxygen comments.

Don't end the brief description at the first period if it's a period which is
part of "i.e." or "e.g.": escape the space following it to prevent Doxygen
from recognizing it as an end of sentence.

See #14866.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73084 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/tipdlg.h

@@ -37,7 +37,7 @@ public:
     virtual ~wxTipProvider();
 
     /**
-        Returns the index of the current tip (i.e. the one which would be returned by GetTip()).
+        Returns the index of the current tip (i.e.\ the one which would be returned by GetTip()).
 
         The program usually remembers the value returned by this function after calling
         wxShowTip(). Note that it is not the same as the value which was passed to