line1            2076 src/diffviewer/ydiff.c     int line1, line2;
line1            2091 src/diffviewer/ydiff.c     for (line1 = 0; fgets (buf, sizeof (buf), f0) != NULL && line1 < from1 - 1; line1++)
line1            2101 src/diffviewer/ydiff.c         line1++;
line1            2102 src/diffviewer/ydiff.c         if (line1 > to1)