MARGIN_IN_LINES  6266 src/window.c         int this_scroll_margin = window_scroll_margin (w, MARGIN_IN_LINES);
MARGIN_IN_LINES  6687 src/window.c     this_scroll_margin = window_scroll_margin (w, MARGIN_IN_LINES);
MARGIN_IN_LINES  6950 src/window.c         this_scroll_margin = window_scroll_margin (w, MARGIN_IN_LINES);
MARGIN_IN_LINES  19576 src/xdisp.c      margin = window_scroll_margin (w, MARGIN_IN_LINES);