cpulimit 1000

# Trims spaces and removed empty lines within multi-line string.
proc trimmedDump { theDump } {
  set aDump {}
  foreach aLineIter [split $theDump "\n"] { set aLine [string trimright $aLineIter]; if { $aLine != "" } { lappend aDump $aLine } }
  return [join $aDump "\n"]
}

# Check Xdump results with reference data.
proc checkXDump { theDoc theRefDump } {
  puts "===== DUMP===="
  set aDump [trimmedDump [uplevel #0 Xdump $theDoc]]
  puts "=============="
  if { $aDump != [trimmedDump $theRefDump] } {
    puts "Error: unexpected document '$theDoc' structure\n===REF DUMP===\n$theRefDump\n=============="
  }
}