-When active, minibuffer prompts that show a default value only show the
-default when it's applicable -- that is, when hitting RET would yield
-the default value. If the user modifies the input such that hitting RET
-would enter a non-default value, the prompt is modified to remove the
-default indication.
-
-With prefix argument ARG, turn on if positive, otherwise off.
-Returns non-nil if the new state is enabled."
+With a prefix argument ARG, enable Minibuffer Electric Default
+mode if ARG is positive, and disable it otherwise. If called
+from Lisp, enable the mode if ARG is omitted or nil.
+
+Minibuffer Electric Default mode is a global minor mode. When
+enabled, minibuffer prompts that show a default value only show
+the default when it's applicable -- that is, when hitting RET
+would yield the default value. If the user modifies the input
+such that hitting RET would enter a non-default value, the prompt
+is modified to remove the default indication."