Reruns/branch lms

I don't suggest that we document regex in the manner that I did below (I did it for my own learnin'). BUT - that comment doesn't seem correct either.

course_id is a "named group".
Basically this re matches:
 1. one or more chars that aren't a '/' or '+'
 2. a divider that is a '/', '|', or '+'
 3. one or more chars that aren't a '/' or '+'
 4. the same divider as 2 above - group 1 is course_id, group 2 is the divider in 2 above
 5. one or more chars that aren't a '/'