chore: some simplifications

[erdos]

No description provided.

[codecov]

Codecov Report

Merging #118 (ac6033e) into master (82b6a30) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #118   +/-   ##
=======================================
  Coverage   93.09%   93.09%           
=======================================
  Files          25       25           
  Lines        1897     1897           
  Branches      107      107           
=======================================
  Hits         1766     1766           
  Misses         24       24           
  Partials      107      107           

Impacted Files	Coverage Δ
src/stencil/eval.clj	100.00% <100.00%> (ø)
src/stencil/util.clj	98.71% <100.00%> (ø)

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