the_search_query() removes backslashes

[TobiasBg]

Local test installations of WP 2.7, 2.8 and trunk (all with default theme, no plugins) do this:

On the frontend, search for something like AC\DC (I know that in their name it is a /, but anyway.)

The search seems to perform correctly (at least there are double backslashes
in the SQL WHERE clause), but on the result page, the search term became ACDC (without backslash) in the search form field and right below it.

It should still be AC\DC though (so that I don't have to add it again, if I want for example modify my search query).

[markjaquith]

(In [12356]) Do not double-stripslashes() on get_search_query(). fixes #11374