old_contents: // Copyright 2019-2020, University of Colorado Boulder
  
  /**
   * Puts a Node on a rectangular background, dynamically sized to fit the Node.
   *
   * @author Chris Malley (PixelZoom, Inc.)
   */
  
  import merge from '../../../../phet-core/js/merge.js';
  import BackgroundNode from '../../../../scenery-phet/js/BackgroundNode.js';
  import Circle from '../../../../scenery/js/nodes/Circle.js';
  import graphingQuadratics from '../../graphingQuadratics.js';
  import GQQueryParameters from '../GQQueryParameters.js';
  
  class GQBackgroundNode extends BackgroundNode {
  
    /**
     * @param {Node} node - the Node that will be put on the background
     * @param {Object} [options]
     */
    constructor( node, options ) {
  
      options = merge( {
        rectangleOptions: {
          fill: GQQueryParameters.equationsBackgroundColor
        }
      }, options );
  
      super( node, options );
  
      // put a red dot at the origin, for debugging positioning
      if ( GQQueryParameters.showOrigin ) {
        this.addChild( new Circle( 3, { fill: 'red' } ) );
      }
    }
  }
  
  graphingQuadratics.register( 'GQBackgroundNode', GQBackgroundNode );
  export default GQBackgroundNode;
new_contents: // Copyright 2019-2021, University of Colorado Boulder
  
  /**
   * Puts a Node on a rectangular background, dynamically sized to fit the Node.
   *
   * @author Chris Malley (PixelZoom, Inc.)
   */
  
  import merge from '../../../../phet-core/js/merge.js';
  import BackgroundNode from '../../../../scenery-phet/js/BackgroundNode.js';
  import Circle from '../../../../scenery/js/nodes/Circle.js';
  import graphingQuadratics from '../../graphingQuadratics.js';
  import GQQueryParameters from '../GQQueryParameters.js';
  
  class GQBackgroundNode extends BackgroundNode {
  
    /**
     * @param {Node} node - the Node that will be put on the background
     * @param {Object} [options]
     */
    constructor( node, options ) {
  
      options = merge( {
        rectangleOptions: {
          fill: GQQueryParameters.equationsBackgroundColor
        }
      }, options );
  
      super( node, options );
  
      // put a red dot at the origin, for debugging positioning
      if ( GQQueryParameters.showOrigin ) {
        this.addChild( new Circle( 3, { fill: 'red' } ) );
      }
    }
  }
  
  graphingQuadratics.register( 'GQBackgroundNode', GQBackgroundNode );
  export default GQBackgroundNode;
subject: update copyright dates from daily grunt work