* IMINDEX: The displayfn of index image objects sets AFTERHARDCOPYFN to close the index file
Removes the need for advising the Tedit hardcopy function. This won't have an effect until a separate PR (after rmk7 is merged) that updates the hardcopy function.
* Index image object explicitly uses OLD-INTERLISP-FILE for printing and reading (cf #1652)
* TEDIT-FIND, TEDIT-OFD: Read old-format TEDIT files
TEDIT-OFD also traps non-stream TEXT arguments that should no longer propagate
* EDITKEYS: Only BKSYSBUF when TEDIT has the TTY
Also, changed the name from Function Keys to Tedit Keys, made the shrunk window open on left-click
* COMPAREDIRECTORIES: better format when one of the columns is empty
* GITFNS: "cob next" asks to confirm the parent branch
* TEDIT-FILE: Pass TEXTSTREAM to TEDIT.GET.OBJECT
* TEDIT-FILE again: same problem in readers for old formats
* Eliminate (OPENTEXTSTREAM "")
