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d2937ff4e1
Previously a key like:
"a\u0000\u0001b" = 1
Would get written with literal control characters, rather than escapes:
"a<00><01>b" = 1
The "valid/key/quoted-unicode" test from toml-test would fail with this,
although it seems they're not run automatically(?)
Can also reproduce with something like:
% cat test.cpp
#include <toml.hpp>
#include <iostream>
int main()
{
const auto data = toml::parse("test.toml");
std::cout << data << "\n";
return 0;
}
% cat test.toml
"a\u0000\u0001b" = "a\u0000\u0001b"
% c++ -I. test.cpp
% ./a.out
"ab" = "a\u0000\u0001b"
% ./a.out | hexdump -C
00000000 22 61 00 01 62 22 20 3d 20 22 61 5c 75 30 30 30 |"a..b" = "a\u000|
00000010 30 5c 75 30 30 30 31 62 22 0a 0a |0\u0001b"..|