Check types with AssertEqual/AssertNotEqual

[blueyed]

This should be done only for incompatible types maybe (i.e. when
comparing list/dict with something else).

This is meant to make the error when comparing a list with something
else more meaningful, where you currently get the following only:

Vim(if):E691: Can only compare List with List

[blueyed]

When this (and #107) get accepted, this needs to be hidden from the stacktrace also:

> in <SNR>34_check_types, line 3
>   throw get(a:000, 2, printf("type mismatch: %s (%s) should be equal to %s (%s)", string(got), get(s:type_names, type(got), type(got)), string(exp), get(s:type_names, type(exp), type(exp))))
> in vader#assert#equal[4]
>   call s:check_types(exp, got)
> tests/utils.vader:133: AssertEqual GetSetting('setting'), 42

The easy way would be to rename the function to vader#assert#_check_types or something similar, but also excluding everything after vader#assert would work.

[blueyed]

Would fix #115.

[junegunn]

Thanks, can you update the failing test case (AssertEqual 4, $ENVVAR)?

[blueyed]

Done. Env vars are strings always.

[junegunn]

Thanks!