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/vlbox.h

@@ -190,7 +190,7 @@ public:
     bool IsSelected(size_t item) const;
 
     /**
-        Selects or deselects the specified item which must be valid (i.e. not
+        Selects or deselects the specified item which must be valid (i.e.\ not
         equal to @c wxNOT_FOUND).
 
         @return @true if the items selection status has changed or @false
@@ -270,7 +270,7 @@ public:
     void SetSelectionBackground(const wxColour& col);
 
     /**
-        Toggles the state of the specified @a item, i.e. selects it if it was
+        Toggles the state of the specified @a item, i.e.\ selects it if it was
         unselected and deselects it if it was selected.
 
         This method is only valid for multi selection listboxes.