warnings with emacs mode

[fblanqui]

⛔ Warning (smie): token simplify is both opener and neither
⛔ Warning (smie): token simplify is both opener and neither
⛔ Warning (smie): token [ is both opener and neither
⛔ Warning (smie): token open is both neither and opener
⛔ Warning (smie): token rule is both opener and neither
⛔ Warning (smie): token simplify is both opener and neither
⛔ Warning (smie): token simplify is both opener and neither
⛔ Warning (smie): token [ is both opener and neither
⛔ Warning (smie): token open is both neither and opener
⛔ Warning (smie): token rule is both opener and neither