Extra space in room invite path breaks codegenned clients

https://github.com/matrix-org/matrix-doc/blob/f281ac69cda3462e73d476cf47abd4460bb5814f/api/client-server/inviting.yaml#L30-L32

This space is breaking my codegenned Matrix client. The comments say that it's there for a reason, but it was added 4 years ago. Is it still necessary, or can we remove it?

Start at api/client-server/inviting.yaml lines 30-32 and read the surrounding path definition and comments. Review the issue discussion and relevant history to determine whether the extra space is still required, then verify that the chosen specification change no longer breaks code-generated clients.

Written by the indexing model from the issue text.