Ömer Sinan Ağacan 819247f179 Update char::escape_debug_ext to handle different escapes in strings vs. chars ...

Fixes #83046

The program

    fn main() {
        println!("{:?}", '"');
        println!("{:?}", "'");
    }

would previously print

    '\"'
    "\'"

With this patch it now prints:

    '"'
    "'"

2021-03-26 11:23:51 +03:00

..

alloc

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backtrace @ af078ecc0b

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core

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panic_abort

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panic_unwind

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proc_macro

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profiler_builtins

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rtstartup

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rustc-std-workspace-alloc

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rustc-std-workspace-core

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rustc-std-workspace-std

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std

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stdarch @ 9c732a56f6

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term

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test

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unwind

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