Remove "\n" from "a:text" in "create" function

Fix from

```text
＿人人人人人人人＿
＞　突然の死
　＜
￣ＹＹＹＹＹＹＹ￣
```

to

```text
＿人人人人人人＿
＞　突然の死　＜
￣ＹＹＹＹＹＹ￣
```

## TODO

* Multi lines

With this PR, multi lines text is folded to one line because all `\n` are removed.