Nicolas Gattolin authored Oct 15, 2018 and Romain Bignon committed Nov 10, 2018

- reformat imports, long lines
- add r flag for regexes, remove u flag when default is unicode
- improve iterator-related code (replace lists with generators where
useful, use next() to get first value, use attrgetter as key func)
- segregate navigation code from logic (page.go in individual
statements)
- avoid builtin name shadowing to avoid potential subtle errors
- add comments on smelly code