Incorrect initialization of `S` in `ZModCharges` definition

⚠️ Found by a local LLM, not a human. This was flagged by an automated documentation-mistake finder (qwen2.5-coder:7b) and passed 10/10 independent verification runs before filing, but it has not been reviewed by a person. Please check it's a genuine error before acting on it.

Summary

The documentation in Physlib/Particles/SuperSymmetry/SU5/ChargeSpectrum/ZMod.lean (around line 81) is incorrect.

Current text

def ZModCharges (n : ℕ) [NeZero n] : Finset (ChargeSpectrum (ZMod n)) :=
  let S : Finset (ChargeSpectrum (ZMod n)) := ofFinset Finset.univ Finset.univ
  S.filter (fun x => IsComplete x ∧ ¬ x.IsPhenoConstrained ∧ ¬ x.YukawaGeneratesDangerousAtLevel 4)

Why this is wrong

The code attempts to create a finite set of charge spectra with values in ZMod n, but the initialization of S is incorrect. ofFinset Finset.univ Finset.univ creates a set with a single element, which is not what is intended.

Suggested correction

def ZModCharges (n : ℕ) [NeZero n] : Finset (ChargeSpectrum (ZMod n)) :=
  Finset.univ.filter (fun x => IsComplete x ∧ ¬ x.IsPhenoConstrained ∧ ¬ x.YukawaGeneratesDangerousAtLevel 4)

Read Physlib/Particles/SuperSymmetry/SU5/ChargeSpectrum/ZMod.lean around lines 81–83 and verify whether the current initialization represents the intended set of charge spectra. Confirm the suggested correction with the project’s available Lean checks; the issue is done when the definition enumerates the intended spectra and still passes those checks.