message: Minor cleanup to simplify the diff
diff: @@ -683,9 +683,8 @@ class CommandMoveHalfPageDown extends CommandEditorScroll {
  ) >= 0,
  });
  - let newFirstLine = editor.visibleRanges[0].start.line;
  - let newLinePosition = newFirstLine + lineOffset;
  - let newPosition = new Position(newLinePosition, startColumn);
  + const newFirstLine = editor.visibleRanges[0].start.line;
  + let newPosition = new Position(newFirstLine + lineOffset, startColumn);
  const maxLineValue = TextEditor.getLineCount() - 1;
  if (newPosition.line > maxLineValue) {
  