Quoting RFC 1952:

"A gzip file consists of a series of "members" (compressed data
sets). [...] The members simply appear one after another in the
file, with no additional information before, between, or after
them."

When presented with multiple valid but concatenated streams, the
old driver returned an empty result once the end of the first
stream was reached, and kept doing so even if fed new data. The
new driver/NIF returned a data_error instead.

zlib:inflateInit/3 has been added to control this behavior, but is
not yet ready for public use.

~tw and new string functions are new since OTP-20 (stdlib-3.4)

* siri/unicode-fixup:
  kernel: Don't call other modules from simple error logger

error_logger implements a simple handler which is used when no other
handler is active. This handler is used during system startup, when
there is no guarantee that all modules are loaded and must therefore
not use any other modules for the formatting.

Commit 41b856a2cb270ef807beaa84afe1bb890de5f237 introduced a call to
io_lib:printable_list/1, which is now removed.