editing.txtの行の分け方がすごく気持ち悪いのを修正する

https://github.com/vim-jp/vimdoc-ja-working/pull/2081#issue-3125957903

> 基本的に helpExample の内容の説明は後ろじゃなくて前に書かれているはず。

L1345～
```
may want to add >
	All Files\t(*.*)\t*\n
<
as the final filter on Windows or >
	All Files\t(*)\t*\n
<
on other platforms, so that the user can still access any desired file.
```