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/regex.h

@@ -163,7 +163,7 @@ public:
     wxString  GetMatch(const wxString& text, size_t index = 0) const;
 
     /**
-        Returns the size of the array of matches, i.e. the number of bracketed
+        Returns the size of the array of matches, i.e.\ the number of bracketed
         subexpressions plus one for the expression itself, or 0 on error.
 
         May only be called after successful call to Compile().