Use “OR” for whitespace separation instead of "AND"

[jcreel]

Can do this at the level of the query builder in SAGE - possibly here https://github.com/TAMULib/SAGE/blob/main/src/main/java/edu/tamu/sage/service/SolrDiscoveryService.java#L142

[kaladay]

This does not require code changes. It can be performed via the UI on the Discvery View by setting the Default Operand.