Fix usage of ranges and to_hex in the same compile unit

[patrickroocks]

Hello!

First of all, thanks a lot for this great package!

I encountered a compile problem when using ranges and bin_to_hex in the same compile unit. After doing some research I came to the conclusion that probably the only way so solve this is to hide the iterators used in bin_to_hex from the formatter in ranges.

My change in detail:

When trying to use spdlog/fmt/bin_to_hex.h in the same compile unit as spdlog/fmt/bundled/ranges.h you got a compile error because there was a multiple definitions for iterable classes. This fix renames the begin() and end() getters in dump_info into getBegin()/getEnd() in order to avoid this collision.

Added an example of ranges in example.cpp to show that it actually works (a to_hex example was already there)

What do you think?

All the best
Patrick

[gabime]

Thanks. Please use snake_case names (get_begin(), get_end())

[patrickroocks]

fixed code style

[gabime]

Thanks @patrickroocks