Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030821
I want to use parentheses matching in a document, that contains
expressions like "\(" and "\[". Emacs seems to recognize these
expressions as escaped parentheses. But that's the behavior I don't
want. Emacs should also match these expressions with ")" and "]", i.e.
ignore the backslash characters.