Change default g:jedi#call_signature_escape to avoid collision
Change default g:jedi#call_signature_escape to avoid collision

Syntax highlighting on chars in g:jedi#call_signature_escape may
break the funciton parameter hint from jedi-vim. Change its default
value to non python syntax symbols to reduce chance of collision

FBruynbroeck/jedi-vim,davidhalter/jedi-vim