[Merged by Bors] - chore: fix implicit-reducible diamonds in elliptic curves

[sgouezel]

The following fails on master, works with the PR:

example :
(WeierstrassCurve.Affine.CoordinateRing.instAlgebra.toSMul : SMul R
W'.CoordinateRing) =
    AdjoinRoot.instSMulAdjoinRoot W'.polynomial := by
  with_reducible_and_instances rfl

---

[github-actions]

PR summary cc26c21489

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff

+ instance : Algebra R W'.CoordinateRing := inferInstance
+ instance : Algebra R[X] W'.CoordinateRing := inferInstance
+ instance : IsScalarTower R R[X] W'.CoordinateRing := inferInstance
- instance : Algebra R W'.CoordinateRing
- instance : Algebra R[X] W'.CoordinateRing
- instance : IsScalarTower R R[X] W'.CoordinateRing

You can run this locally as follows

## summary with just the declaration names:
./scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh contains some details about this script.

---

No changes to technical debt.

You can run this locally as

./scripts/reporting/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[kbuzzard]

Thanks!

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

• ci (staging) / Post-Build Step
• ci (staging) / Lint style
• ci (staging) / Build
• ci (staging) / Post-CI job