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/buffer.h

@@ -178,7 +178,7 @@ public:
     wxCharTypeBuffer(const wxScopedCharTypeBuffer<T>& src);
 
     /**
-        Assigns @a str to this buffer and takes ownership of it (i.e. the
+        Assigns @a str to this buffer and takes ownership of it (i.e.\ the
         buffer becomes "owned").
      */
     wxCharTypeBuffer& operator=(const CharType *str);