If a white space is really a single space ‘ ‘, then you can specify this space as the delimiter character in the File tab of configuration properties. Otherwise, EmEditor doesn’t support such that file.
I will think about that in the future if many customers would like, but please be more specific about the feature you need. As I wrote above, if a single space is all you need, you can specify that as the delimiter. To satisfy all the customers, I would say a regular expression for a delimiter would be a good idea.