<sect2>collapse_unread<label id="collapse_unread">
<p>
Type: boolean<newline>
-Default: unset
+Default: set
-When <em/set/, Mutt will not collapse a thread if it contains any
+When <em/unset/, Mutt will not collapse a thread if it contains any
unread messages.
<sect2>confirmappend<label id="confirmappend">
Type: string<newline>
Default: "!^\.[^.]"
-A regular expression used in the file browser, optionally preceded by
-the <em/not/ operator ``!''. Files whose names don't match this mask
-will not be shown. The match is always case-sensitive.
+A regular expression used in the file browser, optionally preceded
+by the <em/not/ operator ``!''. Only files whose names match this
+mask will be shown. The match is always case-sensitive.
+
<bf/Note:/ if you need ``!'' at the beginning of the regular expression
you should enclose it in paranthesis, in order to distinguish it from