[&foo] is okay but [$foo] is too ambiguous

S03-operators.pod

@@ -711,7 +711,8 @@ C<< prefix:<^> >>, upto operator
 
     ^$limit
 
-Constructs a range of C<0 ..^ +$limit>.  See L</Range and RangeIter semantics>.
+Constructs a range of C<0 ..^ +$limit> or locates a metaclass as a shortcut
+for C<$limit.HOW>.  See L</Range and RangeIter semantics>.
 
 =back
 
@@ -4874,8 +4875,7 @@ not thereby accept multiple arguments on the right side.  You must use
 the normal functional form to pass three or more positional arguments.
 
 This form of operator is parsed with a precedence of addition.
-A C<$> is acceptable in place of C<&>, but in either case the
-next character must be either alphabetic or a left parenthesis.
+The next character after C<&> must be either alphabetic or a left parenthesis.
 Otherwise a normal infix operator starting with that character will
 be assumed.  Hence C<[&&]> parses as a form of the C<&&> operator.