message: fix comment typos "postion" to "position"
  I fixed comment typos "postion" to "position"
diff: @@ -75,7 +75,7 @@ export class SelectWord extends TextObjectMovement {
  start = vimState.cursorStartPosition;
  if (vimState.cursorStopPosition.isBefore(vimState.cursorStartPosition)) {
  - // If current cursor postion is before cursor start position, we are selecting words in reverser order.
  + // If current cursor position is before cursor start position, we are selecting words in reverser order.
  if (/\s/.test(currentChar)) {
  stop = position.getWordLeft(true);
  } else {
  