Fixed pdm list output containing full license text in some cases

[JohnHardy]

Pull Request Checklist

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

The full license string can sometimes be contained inside the package metadata license field, for example:

license = { file="LICENSE" } in pyproject.toml

This has been fixed by checking for the presence of newlines in the license variable, or if it is larger than 50 chars (slightly more than the longest OSI license field).

The tests have been updated.

Note that when exporting the markdown file that contains all the licenses (and full text) the full text license is still not exported. This is because it will always look inside: locations = ("**/LICENSE*", "**/LICENCE*", "**/COPYING*", "**/NOTICE*")

Closes #2538

Before

╭────────────────────────────┬────────────────────────────────┬───────────────────────────────────────────────────────────────────────────────╮
│ name                       │ version                        │ licenses                                                                      │
├────────────────────────────┼────────────────────────────────┼───────────────────────────────────────────────────────────────────────────────┤
│ Arpeggio                   │ 2.0.0                          │ MIT                                                                           │
│ arrow                      │ 1.2.3                          │ Apache 2.0                                                                    │
│ attrs                      │ 23.1.0                         │ MIT License                                                                   │
│ binaryornot                │ 0.4.4                          │ BSD                                                                           │
...
│ platformdirs               │ 3.10.0                         │ MIT License                                                                   │
│ pluggy                     │ 1.2.0                          │ MIT                                                                           │
│ plumbum                    │ 1.8.2                          │ Copyright (c) 2013 Tomer Filiba ([email protected])                       │
│                            │                                │                                                                               │
│                            │                                │ Permission is hereby granted, free of charge, to any person obtaining a copy  │
│                            │                                │ of this software and associated documentation files (the "Software"), to deal │
│                            │                                │ in the Software without restriction, including without limitation the rights  │
│                            │                                │ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     │

After

╭────────────────────────────┬────────────────────────────────┬─────────────────────────────────────────────────╮
│ name                       │ version                        │ licenses                                        │
├────────────────────────────┼────────────────────────────────┼─────────────────────────────────────────────────┤
│ Arpeggio                   │ 2.0.0                          │ MIT                                             │
│ arrow                      │ 1.2.3                          │ Apache 2.0                                      │
│ attrs                      │ 23.1.0                         │ MIT License                                     │
│ binaryornot                │ 0.4.4                          │ BSD                                             │
...
│ platformdirs               │ 3.10.0                         │ MIT License                                     │
│ pluggy                     │ 1.2.0                          │ MIT                                             │
│ plumbum                    │ 1.8.2                          │ MIT License                                     │
│ prompt-toolkit             │ 3.0.38                         │ BSD License                                     │
│ pycomplete                 │ 0.4.0                          │ BSD-3-Clause                                    │

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ca74c76) 84.63% compared to head (c8714b6) 84.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2539   +/-   ##
=======================================
  Coverage   84.63%   84.63%           
=======================================
  Files         104      104           
  Lines       10343    10344    +1     
  Branches     2261     2261           
=======================================
+ Hits         8754     8755    +1     
  Misses       1116     1116           
  Partials      473      473           

Flag	Coverage Δ
unittests	84.42% <100.00%> (+<0.01%)	⬆️

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