old_contents: src = """
  (function() {
      var initialX = 0;
      var initialY = 0;
  
      function onMouseMove(ev) {
          var x = ev.screenX - initialX;
          var y = ev.screenY - initialY;
          window.pywebview._bridge.call('moveWindow', x, y);
      }
  
      function onMouseUp() {
          window.removeEventListener('mousemove', onMouseMove);
      }
  
      function onMouseDown(ev) {
          initialX = ev.clientX;
          initialY = ev.clientY;
          window.addEventListener('mouseup', onMouseUp);
          window.addEventListener('mousemove', onMouseMove);
      }
  
      var dragBlocks = document.querySelectorAll('%s');
      dragBlocks.forEach(function(dragBlock) {
          dragBlock.addEventListener('mousedown', onMouseDown);
      });
  })();
  """
  
new_contents: src = """
  (function() {
      var initialX = 0;
      var initialY = 0;
  
      function onMouseMove(ev) {
          var x = ev.screenX - initialX;
          var y = ev.screenY - initialY;
          window.pywebview._bridge.call('moveWindow', [x, y]);
      }
  
      function onMouseUp() {
          window.removeEventListener('mousemove', onMouseMove);
      }
  
      function onMouseDown(ev) {
          initialX = ev.clientX;
          initialY = ev.clientY;
          window.addEventListener('mouseup', onMouseUp);
          window.addEventListener('mousemove', onMouseMove);
      }
  
      var dragBlocks = document.querySelectorAll('%s');
      dragBlocks.forEach(function(dragBlock) {
          dragBlock.addEventListener('mousedown', onMouseDown);
      });
  })();
  """
  
subject: Fix params in drag JS call.