(ediff-make-control-frame): optimized for display.
Commented out (redraw-display), to improve speed. Got rid of toolbars in control frame in xemacs Changed window-min-height from 1 to 2 (ediff-diff-at-point,ediff-toggle-multiframe): bug fixes. (ediff-destroy-control-frame,ediff-window-display-p): new functions. Converted xemacs *screen* nomenclature to *frame*. Incorporated overlay strings. Ediff no longer runs under emacs 19.28 and earlier and XEmacs 19.11 and earlier. Changed window-system to ediff-window-display. (ediff-toggle-multiframe): fixed. (ediff-destroy-control-frame): new function.
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