Redmine

The attached patch allows using "　" (ideographic space, U+3000) as a separator for search terms in addition to " " (U+0020).

You can perform AND searches by separating terms with a space in the search box or issue filter. Currently, "space" means characters that match the regular expression `\s` in this context. It is sufficient in many cases to consider `\s` as space, but not enough in some languages at least Japanese (and perhaps Chinese). This is because they use "　" (U+3000) when writing text, so they often mistakenly enter U+3000 instead of U+0020 when they want to separate search terms.

Actually, many services such as Google, Bing, and GitHub treat U+3000 as a separator. I think it is a small but nice improvement for those who use Redmine in languages that regularly use U+3000 if Redmine will support U+3000 as a separator for search terms.