- handle options of the form '-a|b' and 'a or b' (gspl-padd.1.gz)
- check parsing of sshfs
- print stats after processing a manpage such as: read x paragraphs, classified y out x, options found in z out of y
- merge adjacent options with an unknown between them (can be done client side) ,e.g. node -cxc
- mine fish shell completions to enrich options that expect an arg and weren't identified as such
- rewrite options.py to use a DFA instead of a regex
- handle -- that cuts args
- handle long options abbreviations
- add 'no options extracted' message on /explain/<foo> if foo has no options
- collapse positional arguments in options.html (see tee)

ongoing

- check xargs example explain

done
- add support for command substitutions
- add JSON api
- add support for pipes, redirections and other shell syntax
- fix es.js '?' font (should be the default, not courier)
- use cdn for d3, bootstrap, jquery
- handle args of them form -e something=something that gets interpreted as '-e', 'something', 'something
- add a debug view that shows all manpages - accessible at /debug
- handle multiple manpages under the same name -- this is handled in the backend by
  returning multiple manpages from store.findmanpage
- adding a rating when explaining without a section so some manpages have priority over others (e.g. node(1) over node(8)), and when there's a tie perhaps return the one with most matched options? (more expensive)
- handle short options values with no space, e.g. -w32
- handle '-' arg
- skip empty man pages
- handle multiple lines returned from lexgrog -- we figure out aliases from each line
- handle links generated by w3mman2html
- don't join adjacent paragraphs in fixer across sections
- set classifier threshold
- handle aliases
- add a feature for bold words (use script -c)
- implement fixers
- include the option in the extracted help text from the manpage

abandoned
- handle ANSI escape sequences elegantly
- refactor feature utility functions