problem:
The spacemacs-completion layer defines the variable:
helm-use-fuzzy
But the spacemacs-base distribution doesn't use the
spacemacs-completion layer by default.
helm-use-fuzzy is used in the helm layer.
When a helm buffer is opened, for example: `SPC SPC`
Then a warnings buffer opens:
>Error (use-package): helm/:config: Symbol’s value as variable is void: helm-use-fuzzy
solution:
Make sure that helm-use-fuzzy is bound and true.