Update README.

README.md

@@ -78,9 +78,7 @@ The overlay rect covers the brushable area defined by [*brush*.extent](#brush_ex
 
 <a href="#brush_move" name="brush_move">#</a> <i>brush</i>.<b>move</b>(<i>group</i>, <i>selection</i>)
 
-Sets the active *selection* of the brush on the specified *group*, which must be a [selection](https://github.com/d3/d3-selection) or a [transition](https://github.com/d3/d3-transition) of SVG [G elements](https://www.w3.org/TR/SVG/struct.html#Groups).
-
-The *selection* must be defined as an array of numbers. For a [two-dimensional brush](#brush), it must be defined as [[*x0*, *y0*], [*x1*, *y1*]], where *x0* is the minimum *x*-value, *y0* is the minimum *y*-value, *x1* is the maximum *x*-value, and *y1* is the maximum *y*-value. For an [*x*-brush](#brushX), it must be defined as [*x0*, *x1*]; for a [*y*-brush](#brushY), it must be defined as [*y0*, *y1*]. The selection may also be specified as a function which returns such an array; if a function, it is invoked for each selected element, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The returned array defines the brush selection for that element.
+Sets the active *selection* of the brush on the specified *group*, which must be a [selection](https://github.com/d3/d3-selection) or a [transition](https://github.com/d3/d3-transition) of SVG [G elements](https://www.w3.org/TR/SVG/struct.html#Groups). The *selection* must be defined as an array of numbers. For a [two-dimensional brush](#brush), it must be defined as [[*x0*, *y0*], [*x1*, *y1*]], where *x0* is the minimum *x*-value, *y0* is the minimum *y*-value, *x1* is the maximum *x*-value, and *y1* is the maximum *y*-value. For an [*x*-brush](#brushX), it must be defined as [*x0*, *x1*]; for a [*y*-brush](#brushY), it must be defined as [*y0*, *y1*]. The selection may also be specified as a function which returns such an array; if a function, it is invoked for each selected element, being passed the current datum `d` and index `i`, with the `this` context as the current DOM element. The returned array defines the brush selection for that element.
 
 <a href="#brush_extent" name="brush_extent">#</a> <i>brush</i>.<b>extent</b>([<i>extent</i>])