anchor.diff:  lines of an activity.  This is superfluous and incorrect syntax for ASL
   activities.  The MASL dumper also emits a "begin, null, end" sequence
   for empty activities which is not useful for ASL.
  +
  +Notem however, that the signature actually serves as the key for the
  +activity.  It cannot be completely omitted from processing.
   
   ==== 3.2.1 'Grep out' the MASL Function Signature
   
  
positive.code: * `x2m`
  
  == 5 Implementation Comments
  
  == 6 Unit Test
  
  
negative.code: were MASL activities.  This is fine.
  
  However, MASL activities have a MASL activity signature (parameters and
  return type) embedded in the activity file.  ASL does not, and even if it
  did, the signature would have a different syntax.  MASL uses an explicit
  begin-null-end sequence for "empty" activities.  ASL simply has zero
  statements in empty activities.
  