line1            2068 src/diffviewer/ydiff.c     int line1, line2;
line1            2083 src/diffviewer/ydiff.c     for (line1 = 0; fgets (buf, sizeof (buf), f0) != NULL && line1 < from1 - 1; line1++)
line1            2093 src/diffviewer/ydiff.c         line1++;
line1            2094 src/diffviewer/ydiff.c         if (line1 > to1)