minor change for MathComp CI #2875

Annotations

2 errors and 11 warnings

The reference choice.Choice.mixin was not found in the current

The reference Choice.mixin_of was not found in the current

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Notation "[ predI _ & _ ]" was already used in scope fun_scope.

Notation "[ predU _ & _ ]" was already used in scope fun_scope.

Notation "[ predD _ & _ ]" was already used in scope fun_scope.

Notation "[ predC _ ]" was already used in scope fun_scope.

Notation "[ preim _ of _ ]" was already used in scope fun_scope.

Notation "_ + _" was already used in scope nat_scope.

Notation "_ - _" was already used in scope nat_scope.

Notation "_ <= _" was already used in scope nat_scope.

Notation "_ < _" was already used in scope nat_scope.

Notation "_ >= _" was already used in scope nat_scope.