fix section heading heuristic
-rw-r--r-- 745 README
-rw-r--r-- 1372110 n1256.html
-rw-r--r-- 1162301 n1256.txt
-rw-r--r-- 1732383 n1548.html
-rw-r--r-- 1474381 n1548.txt
-rwxr-xr-x 2297 tohtml.sh
-rwxr-xr-x 936 translit.sh