unify the reference section with the rest of the docs

[exaexa]

No description provided.

[codecov]

Codecov Report

Merging #645 (a988d34) into develop (0e53a2b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #645   +/-   ##
========================================
  Coverage    91.05%   91.05%           
========================================
  Files           82       82           
  Lines         2012     2012           
========================================
  Hits          1832     1832           
  Misses         180      180           

Impacted Files	Coverage Δ
src/analysis/sampling/affine_hit_and_run.jl	93.47% <ø> (ø)
src/analysis/envelopes.jl	100.00% <100.00%> (ø)

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