I believe this is hard coded in org-entry-get-with-inheritance. The fastest
option would be an override advice with your own function that
replaces (and value " ") with (and value ""), and maybe the two other " "
with "".

John

-----------------------------------
Professor John Kitchin (he/him/his)
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu



On Thu, May 5, 2022 at 6:38 PM Tyler Grinn <tylergrinn@gmail.com> wrote:

>
> I'm exporting sub-trees as pdf files for some classes I'm taking:
>
> # -*- org-use-property-inheritance: t; -*-
>
> * Class A
>   :PROPERTIES:
>   :EXPORT_FILE_NAME: support/Class A
>   :END:
> ** Assignment 1
>    :PROPERTIES:
>    :EXPORT_FILE_NAME+: /assignment-1
>    :END:
>    Some assignment for Class A
> ** Assignment 2
>    :PROPERTIES:
>    :EXPORT_FILE_NAME+: /assignment-2
>    :END:
>    Some other assignment for Class A
> * Class B
>   :PROPERTIES
>   :EXPORT_FILE_NAME: support/Class B
>   :END:
> ** Assignment 1
>    :PROPERTIES:
>    :EXPORT_FILE_NAME+: /assignment-1
>    :END:
>    Some assignment for Class B
> ** Assignment 2
>    :PROPERTIES:
>    :EXPORT_FILE_NAME+: /assignment-2
>    :END:
>    Some other assignment for Class B
>
> And this works great, except there's always a space between
> 'support/Class A' and '/assignment-1.pdf'. Is there any way to
> concatenate the two properties rather than join them with spaces?
>
> Best,
>
> Tyler
>
>