make Label exports a native (LF-terminated) text file rather than Mac Classic (CR-terminated) one, as it's more compatible with the rest of the platform (and the Wx default). Also create file directly on all platforms - no reason why Mac needs a special case with current wx. This code has been this way for many years, the original reason is long gone.

src/Menus.cpp

@@ -2932,13 +2932,7 @@ void AudacityProject::OnExportLabels()
    }
 
    wxTextFile f(fName);
-#ifdef __WXMAC__
-   wxFile *temp = new wxFile();
-   temp->Create(fName);
-   delete temp;
-#else
    f.Create();
-#endif
    f.Open();
    if (!f.IsOpened()) {
       wxMessageBox(_("Couldn't write to file: ") + fName);
@@ -2953,11 +2947,7 @@ void AudacityProject::OnExportLabels()
       t = iter.Next();
    }
 
-#ifdef __WXMAC__
-   f.Write(wxTextFileType_Mac);
-#else
    f.Write();
-#endif
    f.Close();
 }