sets the modified flag. This flag is set automatically
whenever a buffer is modified, and is used to determine which buffers
need to be saved when
ne exits. Normally you would not alter
this flag, but when a buffer is inadvertently modified and you don’t
want the changes saved,
Modified provides a way to make
ne consider the buffer unchanged.
If you invoke
Modified with no arguments, it will toggle the flag.
If you specify 0 or 1, the flag will be set to false or true,
respectively. An asterisk (‘*’) will appear on the status bar if the
flag is true.