small edits in documentation and messages

[stestoll]

This PR fixes a couple of typos and adds a few small improvements in the documentation.

[ricardoV94]

Looks great. I just left a comment about the bad -> infinite change.

[ricardoV94]

Thanks, the changes look good

[ricardoV94]

You seem to have a linting issue here: https://github.com/pymc-devs/pymc3/pull/4921/checks?check_run_id=3319910721#step:4:90

You can install pre-commit locally to format the files before pushing them here: https://github.com/pymc-devs/pymc3/wiki/PyMC3-Python-Code-Style

[stestoll]

Oops. Sorry, I am new to this. Will fix.

[codecov]

Codecov Report

Merging #4921 (f0c4089) into main (6a75744) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #4921      +/-   ##
==========================================
- Coverage   73.17%   73.14%   -0.04%     
==========================================
  Files          86       86              
  Lines       13868    13866       -2     
==========================================
- Hits        10148    10142       -6     
- Misses       3720     3724       +4     

Impacted Files	Coverage Δ
pymc3/sampling.py	85.67% <ø> (ø)
pymc3/step_methods/arraystep.py	94.96% <ø> (ø)
pymc3/step_methods/hmc/base_hmc.py	91.05% <ø> (ø)
pymc3/step_methods/hmc/hmc.py	92.15% <ø> (ø)
pymc3/step_methods/hmc/nuts.py	97.50% <100.00%> (ø)
pymc3/backends/report.py	89.51% <0.00%> (-2.10%)	⬇️
pymc3/parallel_sampling.py	87.20% <0.00%> (-1.02%)	⬇️
pymc3/distributions/dist_math.py	88.29% <0.00%> (+0.92%)	⬆️

[stestoll]

Why does Codecov report a coverage change in files that are unchanged by this PR? Is this just noise from non-deterministic tests?

[ricardoV94]

Why does Codecov report a coverage change in files that are unchanged by this PR? Is this just noise from non-deterministic tests?

The Codecov is impatient and starts reporting changes when some tests are still running. The final codecov should be fine though.

Otherwise, it might be a stochastic test that did not trigger a specific branch or something

[ricardoV94]

Thank @stestoll