In the current 'Root Suite' specifications we do not have a reference in the RFCP syllabus about what Robot Framework does when multiple paths are provided as a suite.
Example
robot my_tests.robot your_tests.robot
Source
This functionality is covered here in the user guide:
https://robotframework.org/robotframework/latest/RobotFrameworkUserGuide.html#specifying-test-data-to-be-executed
Quote from the User Guide:
The name of the created test suite is got from child suite names by concatenating them together with an ampersand (&) and spaces.
Decision
After discussing this in the syllabus comittee it was concluded we should refer to this functionality in the RFCE syllabus. To ensure this is remembered a github issue about this topic is raised, and will be labeled as RFCE relevant.