Guilhem Saurel authored Apr 09, 2018 and Justin Carpentier committed Oct 29, 2018

- remove leftidx package, not available in MathJbx
- replace `\leftidx{^` by `{}^{`
- fix param lists
- comment documentation of commented code
- replace `<i>` & `<li>` with `*i*` & `*li*`, that are valid in html & md