Removed conversions to lists for generators

[atombrella]

No description provided.

[codecov]

Codecov Report

Merging #735 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #735   +/-   ##
=======================================
  Coverage   69.93%   69.93%           
=======================================
  Files          89       89           
  Lines        4417     4417           
=======================================
  Hits         3089     3089           
  Misses       1328     1328

Impacted Files	Coverage Δ
src/wiki/plugins/attachments/forms.py	63.71% <ø> (ø)	⬆️
src/wiki/models/urlpath.py	81.96% <100%> (ø)	⬆️
src/wiki/urls.py	97.4% <100%> (ø)	⬆️
src/wiki/plugins/macros/mdx/toc.py	75.92% <100%> (ø)	⬆️
src/wiki/views/article.py	65.55% <100%> (ø)	⬆️

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[atombrella]

It should speed up things a bit.

[benjaoming]

Seems safe, 100% diff coverage and all of the "has-been lists" are used within the same tested blocks