refactor: Use subs_to_add in return value.
refactor: Use subs_to_add in return value.

The subs_to_add is directly related to a var
called new_subs, which I hope to eliminate
soon.

showell/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,showell/zulip,kou/zulip,andersk/zulip,punchagan/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,rht/zulip,zulip/zulip,showell/zulip,kou/zulip,showell/zulip,hackerkid/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,punchagan/zulip,punchagan/zulip,punchagan/zulip,zulip/zulip,punchagan/zulip,rht/zulip,rht/zulip,rht/zulip,hackerkid/zulip,zulip/zulip,showell/zulip,rht/zulip,kou/zulip,punchagan/zulip,zulip/zulip,showell/zulip,hackerkid/zulip,eeshangarg/zulip,andersk/zulip,rht/zulip,kou/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,andersk/zulip,zulip/zulip,zulip/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,kou/zulip,hackerkid/zulip,showell/zulip,hackerkid/zulip,kou/zulip,andersk/zulip