EDT/WPS Delete Previous Word
  Erases a word, starting with the character left of the cursor.
  Key:   EDT keypad or WPS keypad
         ------------------------
         F13, CTRL/J, or LINEFEED
  Steps:
     1.  Put the cursor to the right of the text you want to erase.
     2.  Press the Delete Previous Word key (see key list above).
  Usage notes:
  o  Delete Previous Word erases all or part of a word depending on the
     cursor position, as follows:
     Cursor positions         Effects of Delete Previous Word
     -------------------------------------------------------------------
     Start of a word or       Erases all of the previous word, including
     between words            the trailing white space.
     Elsewhere in a word      Erases left of the cursor to the start of
                              the current word.  For example, if you are
                              on the "t" in "Digital," you erase "Digi."
     Start of a line          Erases the line break (carriage return) for
                              the previous line, making the current line
                              move up.  Useful to join paragraphs for FILL.
  o  To insert what you erased, use the RESTORE WORD command (with the EDT
     keypad, press GOLD-MINUS).
  o  On VT100-series terminals, the LINEFEED key is the same as CTRL/J.
  Related topics:
     DELETE     ERASE PREVIOUS WORD     RESTORE     RESTORE WORD