Censor words should support sentence level censoring for Chinese

[schungx (Stephen Chung)]

There is a discussion here:

Censored pattern

@sam is correct in that \b doesn’t seem to match any Unicode, or any non-ASCII word breaks. \w seems to be defined narrowly as [A-Za-z0-9_], probably just to parse source-code type texts. And \b is simply (\w\W|\W\w). So using \b has the net effect of turning any character outside simple ASCII letters/digits into white-space letters. There doesn’t seem to be an easy way out to deal with this. An option to deal with this is to omit the \b wrapping altogether – a good idea because this will n…