[Docutils-users] why is UNICODE space after literal markup (``) invalid, but after emphasis(*) or strong(**) ok?

[log4yes <lo...@gm...>]

Hi, does anyone know that? For example,  r"**a**\u2002b" is valid but 
r"``a``\u2002b" will generate a warnning message. \u2002 is a whitespace.

I've checked the source code. Docutils uses regular expression to search 
the end of inline markups. It compiles STRONG regex with re.UNICODE 
option, so it matches the UNICODE space. But why doesn't it use the same 
option with LITERAL regex?

Is here a mistake of implementation? Is there something specially different?