fix fish auto-complete helper

[synfinatic]

Fixes: #472

[codecov]

Codecov Report

Merging #473 (1e7c47f) into main (675e168) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #473   +/-   ##
=======================================
  Coverage   77.66%   77.66%           
=======================================
  Files          23       23           
  Lines        2717     2717           
=======================================
  Hits         2110     2110           
  Misses        538      538           
  Partials       69       69           

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