So this was the question?
In the function options for the function – you set the options to use text instead of a plus sign.
Subfile End . . . . . . . : M ( M-MDLVAL, P-Plus, T-Text )
the current model level default will be highlighted.
If you want all subfiles to always use text – set the model level default, then you can forget about it.
Its a bad idea to mess with generated code – “e or any other generator. If, for some perverse reason, you wanted to do that with 2e then do it via a scan and replace command, built into the subfile function as user source. – then you can forget about it (until you have So forgotten that you lose the source, or work on a version or…
Summary – just use the option provided for the purpose.
BTW Tom – its not an obscure attribute, unless you count that it is on the second page of options you can set up for a subfile.
Or, of course a search in the PDF manuals supplied with theproduct would have shown it up in one go.