fix: allow multiline deprecation message

[flying-sheep]

Fixes #27

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.50%. Comparing base (e37825c) to head (e5ec4f4).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #28      +/-   ##
==========================================
+ Coverage   97.47%   97.50%   +0.02%     
==========================================
  Files           5        5              
  Lines         238      240       +2     
==========================================
+ Hits          232      234       +2     
  Misses          6        6              

Files with missing lines	Coverage Δ
src/scverse_misc/_deprecated.py	100.00% <100.00%> (ø)

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[ilia-kats]

Thanks! That was not a usecase I considered, I assumed the message would always be short and to the point.

[flying-sheep]

Since the “version-deprecated” directive can take a body, we should support that: https://flying-sheep.github.io/doc-play/?pkg=furo&rst=Hi%21%0A%3D%3D%3D%0A%0A..+version-deprecated%3A%3A+1.2.3%0A+++First+line%0A%0A+++Second+line&conf=project+%3D+%22Sphinx+Playground%22%0Ahtml_theme+%3D+%22furo%22%0A%0A