* EDIT-BLOCKFILE ( name -- )

will load the edit module in the background and look for a word
called EDIT-BLOCK that could be used to edit the blockfile.
If no EDIT-BLOCKFILE word can be loaded, nothing will happen.
Otherwise, OPEN-BLOCKFILE is called followed by 0 EDIT-BLOCK
to start editing the file at the first block.

FORTH/BASE misc ordinary primitive