* mml.el (mml-minibuffer-read-description): Allow passing in a prefix
(used by MH-E).
gnus-msg.el: Spelling fix
mml.el (mml-minibuffer-read-description): Use `default' insted of `initial-input' for the argument name
gnus-msg.el: Fix detection of nnir group.
nnir.el (gnus-nnir-group-p): Fix to work with unprefixed groups.