refactor(univariate): readability improvements

[codecov[bot]]

Codecov Report

Merging #601 (9fc469c) into main (74ccf52) will increase coverage by 0.21%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #601      +/-   ##
==========================================
+ Coverage   99.42%   99.63%   +0.21%     
==========================================
  Files          75       73       -2     
  Lines       15438    14951     -487     
  Branches     1431     1431              
==========================================
- Hits        15349    14897     -452     
+ Misses         63       27      -36     
- Partials       26       27       +1     

Impacted Files	Coverage Δ
arch/univariate/distribution.py	100.00% <ø> (ø)
arch/univariate/mean.py	98.45% <ø> (ø)
arch/univariate/recursions_python.py	100.00% <ø> (+0.46%)	:arrow_up:
arch/univariate/volatility.py	99.70% <ø> (ø)
arch/univariate/base.py	98.68% <50.00%> (ø)
arch/bootstrap/__init__.py	77.77% <0.00%> (-22.23%)	:arrow_down:
arch/tests/bootstrap/test_bootstrap.py	98.41% <0.00%> (-1.59%)	:arrow_down:
arch/tests/univariate/test_mean.py	99.70% <0.00%> (-0.30%)	:arrow_down:
arch/univariate/recursions.pyx
arch/bootstrap/_samplers.pyx
... and 1 more

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[bashtage]

Thanks. That is a lot of typos.

[bashtage]

Merging, and I will fix up failures later.