[Console] Fix escaping of args
[Console] Fix StringInput parsing to accept newlines and tabs
merged branch Seldaek/argv-tostring (PR #7657)

This PR was merged into the master branch.

Discussion
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[Console] Input::__toString escaping fixes

Follow up to #7648, also includes a fix for StringInput to parse newlines and other whitespace chars properly instead of normalizing them all to spaces. It was kinda needed to test it properly, so I bundled both in one.

Commits
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93b1369 [Console] Fix StringInput parsing to accept newlines and tabs
8642b67 [Console] Fix escaping of args