minibuffer (q.v.@:) arguments when the set of possible valid inputs
is known; for example, on command names, buffer names, and
file names. Completion usually occurs when @key{TAB}, @key{SPC} or
-@key{RET} is typed. @xref{Completion}.@refill
+@key{RET} is typed. @xref{Completion}.
@anchor{Glossary---Continuation Line}
@item Continuation Line
which configures Emacs for editing a certain sort of text. Ideally,
each programming language has its own major mode. @xref{Major Modes}.
+@c FIXME: Mention margins for filling?
@item Margin
The space between the usable part of a window (including the
fringe) and the window edge.
yanking (q.v.@:) it. @xref{Killing}.
@item MULE
-MULE refers to the Emacs features for editing multilingual
-non-@acronym{ASCII} text using multibyte characters (q.v.).
-@xref{International}.
+@cindex MULE
+Prior to Emacs 23, @acronym{MULE} was the name of a software package
+which provided a @dfn{MULtilingual Enhancement} to Emacs, by adding
+support for multiple character sets (q.v.). @acronym{MULE} was later
+integrated into Emacs, and much of it was replaced when Emacs gained
+internal Unicode support in version 23.
+
+Some parts of Emacs that deal with character set support still use the
+@acronym{MULE} name. @xref{International}.
@item Multibyte Character
A multibyte character is a character that takes up several bytes in a