SYNTAX            : ;E FILE TERM
                  : ;E TERM

RESULTING ARGUMENT: None

FUNCTION          : Interprete the characters following the command as a
                    file name, and execute it as a command-file. Either an
                    ESC or a RETURN terminates the command.

NOTE 1            : If the file name is empty, the previously executed
                    command-file is executed again.
                    If the file name is the name of a directory, a file-
                    requester will be generated on that directory. The
                    user-picked file will then be executed as a command-
                    file.

NOTE 2            : Command interpretation is identical to what happens
                    when commands are entered interactively:
                    - a double-ESC ends a command sequence;
                    - any error terminates a command sequence, upon which
                      the next command is read from the file;
                    - CTRL_C and CTRL_G may be used to abort;
                    - etc.

MATRIX