REPEAT (string, ncopies)

  Class:  Transformational function - Generic

  Concatenates several copies of a string.  The kind type parameter
  is the same as "string".  The value of the result is the
  concatenation of "ncopies" copies of "string".

  Examples:

  REPEAT ('S', 3) has the value SSS.

  REPEAT ('ABC', 0) has the value of a zero-length string.