fix(inspect): ensure non-compact output when object literal has newline in entry text

[dsherret]

Fixes Deno.inspect to make an object literal non-compact when an entry has multiple lines in it.

---

Edit: Old information below

I develop in V:\deno and this test was failing for me because the file path was short enough that it changed the formatting. For example:

$ deno run asdf.ts
error: Uncaught { foo: Error
    at file:///home/david/dev/deno/asdf.ts:2:8 }
$ deno run cli/tests/testdata/run/nested_error.ts
error: Uncaught {
  foo: Error
    at file:///home/david/dev/deno/cli/tests/testdata/run/nested_error.ts:2:8
}
$ cat asdf.ts
throw {
  foo: new Error(),
};
$ cat cli/tests/testdata/run/nested_error.ts
throw {
  foo: new Error(),
};

This PR moves the test into a sub directory, which will cause the formatting to be the same for long and short dev paths.

[dsherret]

I will look into why it's formatting this way for short paths actually.

[dsherret]

I originally moved this file to increase the path length, but I kept it here as part of this PR because it's less cluttered.

[dsherret]

I'm not sure how to write a test, but you can see here this is fixed:

> cargo run
Deno 1.31.3
exit using ctrl+d, ctrl+c, or close()
REPL is running with all permissions allowed.
To specify permissions, run `deno repl` with allow flags.
> Deno.inspect({ test: new Error() })
"{\n  test: Error\n    at <anonymous>:3:11\n}"
> close()
> deno
Deno 1.31.3+8bcffff
exit using ctrl+d, ctrl+c, or close()
REPL is running with all permissions allowed.
To specify permissions, run `deno repl` with allow flags.
> Deno.inspect({ test: new Error() })
"{ test: Error\n    at <anonymous>:3:11 }"

[bartlomieju]

LGTM, this one was fun to debug.