"--version" option does not produce output matching an existing git tag

Bug Report

$ mypy --version
mypy 1.15.0 (compiled: yes)

This version output does not match an existing tag in git.

https://github.com/python/mypy/tags
https://github.com/python/mypy/releases/tag/v1.15.0

I would expect either the --version option to return the version number with a "v" prefix or the git tags to omit the "v" prefix to match the version output.

The existing behavior causes issues where other tools or users are using the --version output to point to a git tag (e.g., when defining a pre-commit hook, or e.g., when aggregating versions of many linters and formatters like in super-linter).

related issue: https://github.com/super-linter/super-linter/issues/6826

Your Environment

• Mypy version used: v1.15.0
• Mypy command-line flags: --version
• Mypy configuration options from mypy.ini (and other config files): N/A
• Python version used: 3.12

Inizia eseguendo il comando indicato mypy --version e seguendo il punto di ingresso della CLI che formatta l'output della versione. Confronta il risultato con il tag esistente v1.15.0, quindi verifica che la convenzione scelta sia coerente e coperta da un controllo appropriato dell'output della versione.