Fix deprecation warning

nlohmann / json

JSON for Modern C++

https://json.nlohmann.me

MIT License

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Fix deprecation warning #4161

Closed nlohmann closed 9 months ago

nlohmann commented 9 months ago

Closes #4129

Interestingly, GCC 4.9 complains about the fix:

error: missing space between '""' and suffix identifier

coveralls commented 9 months ago

coverage: 100.0%. remained the same when pulling 6b8456116737733fc90122868ad55e6b22768b6d on fix-4129 into 6e36c721f0e8ffcabbe4d6625d1b4723fd98fe21 on develop.