-into sets of prefixes. The safe prefixes is found by subtracting from the set of
-candidate prefixes the prefixes that is enclosing any of the unfixes. A prefix
-is enclosing an unfix if the unfix is in the set of its sub-prefixes. As an
-example, \code{``a.b''} is enclosing \code{``a''}, as is \code{``a''}. The safe
-prefixes is unified in a \type{PrefixSet}. If a prefix has only one occurrence,
-and is a simple expression, it is considered unsuitable as a move target. This
-occurs in statements such as \code{``a.foo()''}. For such statements it bares no
-meaning to extract and move them. It only generates an extra method and the
-calling of it.
+into sets of prefixes. The safe prefixes are found by subtracting from the set
+of candidate prefixes the prefixes that is enclosing any of the unfixes. A
+prefix is enclosing an unfix if the unfix is in the set of its sub-prefixes. As
+an example, \code{``a.b''} is enclosing \code{``a''}, as is \code{``a''}. The
+safe prefixes is unified in a \type{PrefixSet}. If a prefix has only one
+occurrence, and is a simple expression, it is considered unsuitable as a move
+target. This occurs in statements such as \code{``a.foo()''}. For such
+statements it bares no meaning to extract and move them. It only generates an
+extra method and the calling of it.