Benny Halevy 15c9f0f0df utils: to_string: generalize range helpers ...

As seen in https://github.com/scylladb/scylladb/issues/13146
the current implementation is not general enough
to provide print helpers for all kind of containers.

Modernize the implementation using templates based
on std::ranges::range and using fmt::join.

Extend unit test for formatting different types of ranges,
boost::transformed ranges, deque.

Fixes #13146

Signed-off-by: Benny Halevy <bhalevy@scylladb.com>

2023-05-02 10:48:46 +03:00

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