re-added accidentally omitted 'ANSI'

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53840 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -16,8 +16,8 @@ changes:
 - Many wxWidgets functions taking "const wxChar *" have been changed to take
   either "const wxString&" (so that they accept both Unicode and ANSI strings;
   the argument can't be NULL anymore in this case) or "const char *" (if the
-  strings are always; may still be NULL). This change is normally backwards
-  compatible except:
+  strings are always ANSI; may still be NULL). This change is normally
+  backwards compatible except:
 
   a) Virtual functions: derived classes versions must be modified to take
      "const wxString&" as well to make sure that they continue to override the