Minor documentation fixes for TRAM

[clonker]

No description provided.

[codecov]

Codecov Report

Merging #181 (1515e18) into main (65eecc5) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #181   +/-   ##
=======================================
  Coverage   93.32%   93.32%           
=======================================
  Files         129      129           
  Lines       10353    10356    +3     
=======================================
+ Hits         9662     9665    +3     
  Misses        691      691           

Impacted Files	Coverage Δ
deeptime/markov/_util.py	90.90% <ø> (ø)
deeptime/base.py	97.05% <100.00%> (+0.14%)	⬆️
deeptime/markov/msm/tram/_tram.py	90.27% <100.00%> (-0.26%)	⬇️

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