write_json(.., /*pretty=*/false) still outputs unnecessary spaces

[j.lonnee@…]

Using boost::property_tree::write_json(output, data, /*pretty=*/false); with an array in the data still outputs spaces before the ']'.

When you want to calculate HASH-es from JSON (and therefor do not want extra whitespaces in it) generated by different tools that is a problem.

[anonymous]

See http://www.boost.org/doc/libs/1_55_0/boost/property_tree/detail/json_parser_write.hpp :

In function 'write_json_helper' please replace the line:

stream << Str(4 * indent, Ch(' ')) << Ch(']');

With the 2 lines:

if (pretty) stream << Str(4 * indent, Ch(' '));
stream << Ch(']');

[Sebastian Redl]

Dupe of #7180.