1037 			if (STRNCMP(linebuf, "1c1", 3) == 0  in check_external_diff()
1038 				|| STRNCMP(linebuf, "@@ -1 +1 @@", 11) == 0)  in check_external_diff()
1673 	    else if ((STRNCMP(line, "@@ ", 3) == 0))  in diff_read()
1675 	    else if ((STRNCMP(line, "--- ", 4) == 0)  in diff_read()
1677 		    && (STRNCMP(line, "+++ ", 4) == 0)  in diff_read()
1679 		    && (STRNCMP(line, "@@ ", 3) == 0))  in diff_read()
1697 	    if (STRNCMP(line, "@@ ", 3)  != 0)  in diff_read()
1996 	if (STRNCMP(p1, p2, l) != 0  in diff_equal_char()
2220 	if (STRNCMP(p, "filler", 6) == 0)  in diffopt_changed()
2225 	else if (STRNCMP(p, "context:", 8) == 0 && VIM_ISDIGIT(p[8]))  in diffopt_changed()
2230 	else if (STRNCMP(p, "iblank", 6) == 0)  in diffopt_changed()
2235 	else if (STRNCMP(p, "icase", 5) == 0)  in diffopt_changed()
2240 	else if (STRNCMP(p, "iwhiteall", 9) == 0)  in diffopt_changed()
2245 	else if (STRNCMP(p, "iwhiteeol", 9) == 0)  in diffopt_changed()
2250 	else if (STRNCMP(p, "iwhite", 6) == 0)  in diffopt_changed()
2255 	else if (STRNCMP(p, "horizontal", 10) == 0)  in diffopt_changed()
2260 	else if (STRNCMP(p, "vertical", 8) == 0)  in diffopt_changed()
2265 	else if (STRNCMP(p, "foldcolumn:", 11) == 0 && VIM_ISDIGIT(p[11]))  in diffopt_changed()
2270 	else if (STRNCMP(p, "hiddenoff", 9) == 0)  in diffopt_changed()
2275 	else if (STRNCMP(p, "closeoff", 8) == 0)  in diffopt_changed()
2280 	else if (STRNCMP(p, "followwrap", 10) == 0)  in diffopt_changed()
2285 	else if (STRNCMP(p, "indent-heuristic", 16) == 0)  in diffopt_changed()
2290 	else if (STRNCMP(p, "internal", 8) == 0)  in diffopt_changed()
2295 	else if (STRNCMP(p, "algorithm:", 10) == 0)  in diffopt_changed()
2298 	    if (STRNCMP(p, "myers", 5) == 0)  in diffopt_changed()
2303 	    else if (STRNCMP(p, "minimal", 7) == 0)  in diffopt_changed()
2308 	    else if (STRNCMP(p, "patience", 8) == 0)  in diffopt_changed()
2313 	    else if (STRNCMP(p, "histogram", 9) == 0)  in diffopt_changed()
3275     if (STRNCMP(mb[0].ptr, "@@ ", 3)  != 0)  in xdiff_out()