Improve elemwise docstrings

[fonnesbeck]

Description

Improve elemwise math function docstrings; remove generic docstring from being appended.

Related Issue

• Closes DOC: Docstrings for Elemwise Ops are not very helpful #292
• Related to Improved docstrings for Elemwise functions #830

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pytensor--1255.org.readthedocs.build/en/1255/

[codecov]

Codecov Report

Attention: Patch coverage is 92.20779% with 6 lines in your changes missing coverage. Please review.

Project coverage is 81.99%. Comparing base (69efc68) to head (865809c).
Report is 142 commits behind head on main.

Files with missing lines	Patch %	Lines
pytensor/tensor/math.py	92.10%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1255   +/-   ##
=======================================
  Coverage   81.99%   81.99%           
=======================================
  Files         188      188           
  Lines       48551    48553    +2     
  Branches     8673     8673           
=======================================
+ Hits        39810    39812    +2     
  Misses       6579     6579           
  Partials     2162     2162           

Files with missing lines	Coverage Δ
pytensor/tensor/elemwise.py	89.59% <100.00%> (ø)
pytensor/tensor/math.py	92.01% <92.10%> (ø)

... and 3 files with indirect coverage changes

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[ricardoV94]

@fonnesbeck looks good, we need to check what the rendered docs look like. Does help() or whatever your IDE use also show the new docstrings nicely?

[fonnesbeck]

Here is help(pt.math.exp)

[ricardoV94]

Docs must use some hardcoded stuff: https://pytensor--1255.org.readthedocs.build/en/1255/library/tensor/basic.html#pytensor.tensor.exp

But this is already a nice improvement