STRING-REVERSE-SEARCH-NOT-SET, and effect upon STRING-RIGHT-TRIM

[Jon L White <JONL at MIT-MC>]

    Date: 20 September 1981 16:26-EDT
    From: David C. Plummer <DCP at MIT-MC>
    Subject:  Why can't things ever be tested? Or, Doesn't anybody else 
	      use strings (if they are, why is this breaking for me)?
    In the current string package...
    (string-right-trim '(#\space) "this is a test        ")
    "this is a test        "
    ;; STRING-LEFT-TRIM and STRING-TRIM both trim from the left, but
    ;; even STRING-TRIM doesn't trim from the right. 

Fixed as of STRAUX version 74.

Sorry for waiting so long to answer this one -- indeed it sounds like
these two functions (STRING-RIGHT-TRIM and STRING-TRIM) aren't used
by anybody else.  The culprit was a fence-post-error-by-1 in the
default calculation of the 'limit' argument to STRING-REVERSE-SEARCH-NOT-SET
(works ok when user supplies that arg).  It turns out that  STRING-RIGHT-TRIM
calls STRING-REVERSE-SEARCH-NOT-SET, and was getting this wrong value
back . . .