FUNCTION STRETCH()

  Short:
  ------
  STRETCH() Imbeds characters in a string

  Returns:
  --------
  <cStretched> => string with characters imbedded

  Syntax:
  -------
  STRETCH(cSource,cFill,nEvery)

  Description:
  ------------
  Imbeds character <cFill> in string <cSource> every
  <nEvery> character

  Examples:
  ---------
   cString := "SUPERFUNCTION"

   cString := STRETCH(cString,' ',1)

   // (returns "S U P E R F U N C T I O N")

  Notes:
  -------
  This hombre might be called EXPAND in other parts

  Source:
  -------
  S_STRETC.PRG