bar}}, @w{@samp{foo@ @ @ bar}}, and so on (but not @samp{foobar}). If
you want to make spaces match sequences of newlines as well as spaces
and tabs, customize the option to make its value be the regular
-expression @samp{[[:space:]\n]+}. (The default behavior of the
+expression @samp{[ \t\n]+}. (The default behavior of the
incremental regexp search is different; see @ref{Regexp Search}.)
If you want whitespace characters to match exactly, you can turn lax