Add several simple lemmas (mostly about list and map filter).

See merge request iris/stdpp!226

Avoid relying on buggy simpl never behavior

See merge request iris/stdpp!228

Alternate take on
https://gitlab.inria.fr/bertot/stdpp/-/commit/895121f919c6f1332f41f658ce7f850e391eb49e,
which is used as an overlay in Coq for
https://github.com/coq/coq/pull/13448.

add Nat_iter_mul

See merge request iris/stdpp!227

add pred_infinite_surj

See merge request iris/stdpp!225

rename elem_of_equiv_L -> set_eq, and set_equiv_spec_L -> set_eq_subseteq

See merge request iris/stdpp!210

rename elem_of_equiv -> set_equiv and set_equiv_spec -> set_equiv_subseteq, and rename some instances to get out of the way

Add `eunify` tactic that lifts Coq's `unify` tactic to `open_constr`

See merge request iris/stdpp!224

Rename `Forall_Forall2` → `Forall_Forall2_diag`

See merge request iris/stdpp!223

names for big operators in Iris.

Rename `_11` and `_12` suffixes into `_1_1` and `_1_2`

See merge request iris/stdpp!222

Fix documentation of `select` to state that it selects the "last" hypothesis.

See merge request iris/stdpp!221

Various `omap` lemmas for finite maps; generalize `map_size_{insert,delete}`.

See merge request iris/stdpp!206

Robbert Krebbers authored 4 years ago and Ralf Jung committed 4 years ago

* Add lemma `map_omap_union`.
* Add lemmas `map_disjoint_fmap` and `map_disjoint_omap`.
* Add lemmas `fmap_merge` and `omap_merge`.
* Add lemma `omap_delete`.
* Generalize `omap_insert` and `omap_singleton` to cover both the `Some` and `None` case. Add `_Some` and `_None` versions of the lemmas for the specific cases.
* Generalize `map_size_insert` and `map_size_delete` in the same way.
* Add lemmas `lookup_fmap_Some`, `lookup_omap_Some`, and `lookup_omap_id_Some`.

Rename instance `finmap_lookup_total` → `map_lookup_total`.

See merge request iris/stdpp!220

add map_zip_diag and the lemmas required for that

See merge request iris/stdpp!217

remove unused find_pat tactic

Closes #93

See merge request iris/stdpp!219