* raimo/stdlib/optimize-gen_statem:
  Optimize plain call response time
  Correct typo in design principles for gen_statem

Matching can be done on any terms.

A minor fix.

If the Erlang shell saves no results (history(0) or results(0)), the
evaluator process now garbage collects itself. This means that any
huge binaries created by the evaluation are reclaimed faster than
before.

* hasse/stdlib/unicode_stacktrace/OTP-14847/ERL-553:
  stdlib: Handle Unicode when formatting stacktraces

* hasse/stdlib/find_src/OTP-14832/ERL-527:
  stdlib: Correct a filelib test case
  stdlib: Let filelib:find_source() search subdirs

See also ERL-553 and ERL-544 (commit c3ddb0f).

'tar_entry()' values are only returned if we specify the 'verbose'
option when calling table/2, which table/1 doesn't do.

Now, it appears that Dialyzer as of OTP 20 is clever enough to realize
that the return type of table/1 must intersect with the return type of
table/2, and so it ignores the fact that table/1 says it returns
strings, and therefore its callers are expected to be dealing with
'tar_entry()' tuples, and never with strings.

This is obviously a mismatch between what the code does and what the
spec says is does, leading to false Dialyzer warnings on code that uses
table/1 (and, presumably, also table/2 when called without
the 'verbose' option.)