anchor.diff:  Immediate commands
   ------------------
   
  -Immediate commands are executed on the command line. They are not stored as part of the program. They have no line number. They are available only in "run" mode.
  +Immediate commands are executed on the command line.
  +They are not stored as part of the program.
  +They have no line number.
  +They are available only in "run" mode.
   
   NEW
   ~~~
  
positive.code: The line specification may be in the form of a single line number, a range (two numbers separated by a hyphen), or a starting line and a count separated by a plus sign.
  
  Examples:
  |==========
  |Command |Result
  |LIST |Lists the entire program.
  
negative.code: ~~~
  
  Specifies the number of dimensions and maximum subscripts for each dimension.
  (Without a DIM statement, variables may have a single dimension of at most 10.)
  
  Examples:
  
  