use ! when possible to avoid overzealous generalization

tests/algebra.v

tests/heap_lang.ref

tests/heap_lang.v

tests/heap_lang2.ref

tests/heap_lang2.v

tests/ipm_paper.v

tests/proofmode.ref

tests/proofmode.v

tests/proofmode_iris.ref

tests/proofmode_iris.v

theories/algebra/agree.v

theories/algebra/auth.v

theories/algebra/excl.v

theories/algebra/gmap.v

theories/algebra/gset.v

theories/algebra/list.v

theories/base_logic/bi.v

theories/base_logic/derived.v

theories/base_logic/lib/auth.v

theories/base_logic/lib/boxes.v