What would you like to be added?

When using InfoS or ErrorS with a key/value that has a multi-line string as value, that value will appear as quoted string in the log message, i.e. the log message will still be a single line.

It would be nicer to print the value in text mode so that it goes across multiple lines, with clear indicators for start and end of the value. Indention could be used to avoid mistaking some embedded line as the start of a new log message.

In JSON mode, the value should be formatted normally.

/sig instrumentation
/wg structured-logging

Why is this needed?

Always printing as a single line can can make the log output unreadable (#104868).