anchor.diff:  |LIST 100+ |Lists line 100 and the next 20 lines.
   |==========
   
  +LOAD
  +~~~~
  +
  +Loads a stored program into memory.
  +Sorts statements by line number.
  +Clears the current program prior to loading the new one.
  +
  +Syntax:	LOAD filename
  +
  +The 'filename' argument may be enclosed in quotes.
  +Quotes are necessary when the name contains a space character.
  +
  +NEW
  +~~~
  +
  +Clears the current program.
  +Does not ask to save a loaded program.
  +
  +Syntax:	NEW
  +
   PRETTY
   ~~~~~~
   
  
positive.code: 
  The second phase executes statements, starting with the lowest-numbered statement and following the path of execution.
  
  TRACE
  ~~~~~
  
  
negative.code: Profiling excludes the first phase of processing of certain lines (DATA, FILES, and DEF FN).
  These lines are processed before the program begins, and they do nothing when executed in the main execution.
  For example, placing a DATA statement inside of a FOR/NEXT loop does not cause the lines data values to be stored multiple times.
  
  RENUMBER
  ~~~~~~~~
  