@item @code{right-triangle}, @code{left-triangle}
The former is used by overlay arrows. The latter is unused.
-@item @code{up-arrow}, @code{down-arrow}, @code{top-left-angle} @code{top-right-angle}
+@item @code{up-arrow}, @code{down-arrow}
@itemx @code{bottom-left-angle}, @code{bottom-right-angle}
-@itemx @code{top-right-angle}, @code{top-left-angle}
-@itemx @code{left-bracket}, @code{right-bracket}, @code{top-right-angle}, @code{top-left-angle}
+@itemx @code{top-left-angle}, @code{top-right-angle}
+@itemx @code{left-bracket}, @code{right-bracket}
Used to indicate buffer boundaries.
@item @code{filled-rectangle}, @code{hollow-rectangle}
@itemx @code{vertical-bar}, @code{horizontal-bar}
Used for different types of fringe cursors.
-@item @code{empty-line}, @code{exclamation-mark}, @code{question-mark}, @code{exclamation-mark}
+@item @code{empty-line}, @code{exclamation-mark}, @code{question-mark}
Not used by core Emacs features.
@end table