Fix #256: Fix direction of f_op lemmas

Closes #256

See merge request iris/iris!303

Turn all `f_op` lemmas to have shape `f (x ⋅ y) = f x ⋅ f y`, following the plan
in iris/iris!295 (comment 39151), plus
`cmra_morphism_op`.

Move array stuff to own file

See merge request iris/iris!299

Fix issue #260: Error message when iLöb used on non-SBI

Closes #260

See merge request iris/iris!302

Fix issue #259: Error message when iRevert is used on out of scope variable

Closes #259

See merge request iris/iris!301

Based on @Blaisorblade's suggestion.

fix typo in -d> docs

See merge request iris/iris!298

Add some trivial but useful heaplang libraries.

See merge request iris/iris!291

More conventions in style guide

See merge request iris/iris!297

Clearer statement for propositional extensionality

See merge request iris/iris!296

Examples for I and SI: uPredI, uPredSI, iPropI, iPropSI.

- And use prop_ext instead of prop_ext_2 in other proofs.

Add `big_sepL2_app_inv_2`.

See merge request iris/iris!292

Dan Frumin authored 5 years ago and Robbert Krebbers committed 5 years ago

And shorten the proof.

Add `head_prim_fill_reducible`.

See merge request iris/iris!293