template didn't work successful

[cllee1214]

vesion is ^13.0.13

i want custom the 'interface HttpResponse' in fetch client.
After i copy templates to local and modify 'fetch-http-client.ejs' , regenerate a new typescript file, but it look like didn't work successful。

my code:

in fetch-http-client.ejs

console info(look like already find etch-http-client.ejs?):

template:

but in a.ts, it's still old interface:

can give me some help.
tanks