* bjorn/stdlib/rand-export_seed/OTP-13162:
  Correct rand:export_seed/0 when there is no prior seed

According to the documentation, rand:export_seed/0 should return
'undefined' if the seed has not been intialized. However, it will
create and return a seed. That means that the following code
will not work as expected:

  case rand:export_seed() of
     undefined -> rand:seen({1,2,3});
     _ -> ok
  end,
  rand:uniform(Range)

Add parentheses around annotated type union elements in map pair
types. The bug was introduced in Erlang/OTP 18.0.

Print constraints as 'V :: T' rather than 'is_subtype(V, T)'.

erl_lint:format_error/1 would crash with a function error if
conflicting types were given. That was most easily noticed in the
shell:

  Eshell V7.0.3  (abort with ^G)
  1> <<0/integer-binary>>.
  *** ERROR: Shell process terminated! ***

Noticed-by: Aleksei Magusev

The shell command 'rp' prints strings as lists of integers
when pretty printing of lists is 'false'.

beam_lib:all_chunks/1 and beam_lib:build_module/1 can be useful
for special-purpose stripping, for example to remove the "Line"
chunk.

OTP-12032

* tomszilagyi/shell-support-del-home-end:
  Erlang shell: Support keys Del, Home and End

* nybek/supervisor_reporting_error:
  Fix supervisor reporting error