&optional x ¶ed enters the editor. It is basically as specified in Common Lisp. If
x is supplied and is a symbol, the definition of x is put into a
buffer, and that buffer is selected. If x is a pathname, the file
specified by x is visited in a new buffer. If x is not supplied or
nil, the editor is entered in the same state as when last exited.
The Entry Hook is invoked each time the editor is entered.
&optional value ¶exit-hemlock leaves Hemlock and return to Lisp; value is the
value to return, which defaults to t. The hook
Exit Hook is invoked before this is done.
pause-hemlock suspends the editor process and returns control to the shell.
When the process is resumed, it will still be running Hemlock.