tools.completion: speed up apropos by 35%.  Fixes #101.
tools.completion: speed up apropos by 35%.  Fixes #101.

erg/factor,mcandre/factor,erg/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,erg/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,erg/factor