Is there a way to concatenate regular expressions in ruby?  Something
like Regexp.union but without the or between expressions.

For example say i have the following regular expressions:

  Set = /[\[][1-9][\d][\]]/
  Field = /[F][S]?[1-9][\d]*/

and i want to make a regular expression to match both of them, i'd like
to be able to do something like the following:

  SetThenField = Set + /([\s])*/ + Field + /[\s]/

- Geoff