Merge branch 'ralf/bool_decide' into 'master'

add invserses of bool_decide_{true,false}

See merge request !81
8 jobs for master in 8 minutes and 31 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #35911
fp
build-coq.8.10.dev

00:07:54

passed #35917
fp
build-coq.8.7.2

00:02:46

passed #35916
fp-timing
build-coq.8.8.0

00:02:43

passed #35915
fp
build-coq.8.8.1

00:02:51

passed #35914
fp
build-coq.8.8.2

00:03:05

passed #35913
fp-timing
build-coq.8.9.0

00:03:18

passed #35912
fp
build-coq.8.9.1

00:03:45

passed #35910
fp
build-coq.dev

00:08:31