jedi#smart_auto_mappings: use `\m` with `search()` for `magic`
jedi#smart_auto_mappings: use `\m` with `search()` for `magic`

With `nomagic` being set (not recommended, but might happen), the
pattern would not work.
This patch sets `\m` explicitly.

FBruynbroeck/jedi-vim,davidhalter/jedi-vim