bitcoin/bips — pull request #130 by bip39JP (2014-12-20 12:09:54+00:00)
Title: Clarify necessity for ideographic spaces.

I left it unclear / open to interpretation on whether to use ideographic
spaces, but realized that without being specific on its necessity,
developers may implement something that would cause trouble with the
Japanese user. (two words looking like one word, or phrase verification
failing because it can't handle ideographic spaces, etc.)

Hopefully, this will clear up any mis-understandings.