widen-snips

Updates the sizes of the snips marked by add-wide-snip so that their right-hand sides match the right-hand-size of the canvas.

Most changes in the width of the canvas are already handled, but if the autowrapping status of a buffer changes you may want to use this method.

• (send a-mred:wide-snip-canvas widen-snips wrap) -> void
      wrap : boolean

  If wrap is #t the snips will also have their max-width set so that they may be autowrapped.