Various small doc fixes

[jakobnissen]

No description provided.

[codecov]

Codecov Report

Merging #253 (b68ad2e) into master (f2536a6) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #253      +/-   ##
==========================================
+ Coverage   88.73%   88.77%   +0.04%     
==========================================
  Files          30       30              
  Lines        2325     2325              
==========================================
+ Hits         2063     2064       +1     
+ Misses        262      261       -1     

Flag	Coverage Δ
unittests	88.77% <ø> (+0.04%)	⬆️

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Impacted Files	Coverage Δ
src/alphabet.jl	92.59% <ø> (ø)
src/bit-manipulation/bitpar-compiler.jl	70.83% <0.00%> (+0.83%)	⬆️

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