Use `field_marker` pattern to look for start of a directive option block
tree9bcc8fd1f5c8739323dea9489d8bbb628b4ffbfe
-rw-r--r-- 9574 BUGS.txt
-rw-r--r-- 5009 COPYING.txt
-rw-r--r-- 48262 FAQ.txt
-rw-r--r-- 102740 HISTORY.txt
-rw-r--r-- 293 MANIFEST.in
-rw-r--r-- 11051 README.txt
-rw-r--r-- 12109 RELEASE-NOTES.txt
-rw-r--r-- 3120 THANKS.txt
drwxr-xr-x - docs
drwxr-xr-x - docutils
-rwxr-xr-x 638 install.py
drwxr-xr-x - licenses
-rw-r--r-- 217 setup.cfg
-rwxr-xr-x 8365 setup.py
drwxr-xr-x - test
drwxr-xr-x - tools