The name made no sense and it was not used anywhere to my knowledge. If it
was used anywhere, it would be very unreliable as it contained hints like
`rtc_trans` that would generally lead to loops.

silence fewer warnings, add comment about overwriting notation

See merge request !49

fix λ.. printing and test it

See merge request iris/stdpp!51

Make trivial instances explicit

See merge request iris/stdpp!50

This is in preparation for coq/coq#9274.

`tc_to_bool` to turn a type class into a Boolean that expresses if there is an instance

See merge request iris/stdpp!48

Add results about deleting and inserting filtered out elements

See merge request !46

Get rid of the awk.Makefile references

See merge request iris/stdpp!47

Two reasons:

- The equality makes it very hard to use the lemma with `rewrite`.
- The version for lists `insert_zip_with` does not have the equality either.