bug#54516: Sed help message error

[Rolf Johns]

Hello there,

Here's a random bug I just found:
sed|sed 's/sed/bob/g;'
This should replace the word sed in the help but it doesn't since the help
output is actually in the error pipe. With this version of the command
it'll work however, which proves this:
sed 2>&1|sed 's/sed/bob/g;'

So, is this a feature or a bug considering "sed --help" outputs in the
normal output pipe?

Thanks