#2763 start improving latexify

[valentinsulzer]

Description

Start improving latexify. Goal is for the output of SPM, SPMe, and DFN to be clean.

Fixes #2763
Fixes #2762

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #) - note reverse order of PR #s. If necessary, also add to the list of breaking changes.

• New feature (non-breaking change which adds functionality)
• Optimization (back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)

Key checklist:

• No style issues: $ pre-commit run (see CONTRIBUTING.md for how to set this up to run automatically when committing locally, in just two lines of code)
• All tests pass: $ python run-tests.py --all
• The documentation builds: $ python run-tests.py --doctest

You can run unit and doctests together at once, using $ python run-tests.py --quick.

Further checks:

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

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[valentinsulzer]

This code snippet would allow us to update print names semi-automatically, not sure if it's a good idea though since it uses locals()

import pybamm

var2 = pybamm.Variable("var")
test = pybamm.Variable("c_e")

loc = {k: v for k, v in locals().items() if isinstance(v, pybamm.Symbol)}

for key, value in loc.items():
    value.print_name = key

print(var2.print_name)  # prints var2
print(test.print_name)  # prints test

Combined with this it might be fully automatable

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01 ⚠️

Comparison is base (d773b8d) 99.68% compared to head (c19fbed) 99.68%.

❗ Current head c19fbed differs from pull request most recent head 9800bbd. Consider uploading reports for the commit 9800bbd to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2764      +/-   ##
===========================================
- Coverage    99.68%   99.68%   -0.01%     
===========================================
  Files          272      272              
  Lines        19031    19027       -4     
===========================================
- Hits         18972    18968       -4     
  Misses          59       59              

Impacted Files	Coverage Δ
pybamm/models/submodels/thermal/lumped.py	100.00% <ø> (ø)
pybamm/expression_tree/concatenations.py	100.00% <100.00%> (ø)
pybamm/expression_tree/operations/latexify.py	100.00% <100.00%> (ø)
pybamm/expression_tree/printing/print_name.py	100.00% <100.00%> (ø)
pybamm/expression_tree/variable.py	100.00% <100.00%> (ø)
pybamm/models/base_model.py	99.30% <100.00%> (ø)
...s/full_battery_models/lithium_ion/electrode_soh.py	100.00% <100.00%> (ø)
.../submodels/active_material/base_active_material.py	100.00% <100.00%> (ø)
...lectrolyte_diffusion/base_electrolyte_diffusion.py	100.00% <100.00%> (ø)
...ybamm/models/submodels/interface/base_interface.py	100.00% <100.00%> (ø)
... and 5 more

... and 1 file with indirect coverage changes

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[actualpriyanshu]

A lot of code changed. Looks good to me!

[valentinsulzer]

I was struggling to understand the regex code so just rewrote it