{textformat}是一个用于格式化文本的
块函数。
它一般会清理空格和特殊字符，该函数主要清理空格和特殊字符，对段落按单词边界换行和行缩进等段落格式化处理。
你可以明确指定参数，或者使用预设风格。当前“email”是唯一可用的风格。
| 参数名称 | 类型 | 必选参数 | 默认值 | 说明 |
|---|---|---|---|---|
| style | string | No | n/a | 预设风格 |
| indent | number | No | 0 | 每行缩进的字符数 |
| indent_first | number | No | 0 | 首行缩进的字符数 |
| indent_char | string | No | (single space) | 缩进使用的字符 |
| wrap | number | No | 80 | 每行长度（换行） |
| wrap_char | string | No | \n | 断行使用的字符 |
| wrap_cut | boolean | No | FALSE |
设置TRUE将会按字符换行，而不是按单词边界换行。 |
| assign | string | No | n/a | 将输出的内容赋值到模板变量 |
Example 8.22. {textformat}
{textformat wrap=40}
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is bar.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
{/textformat}
输出:
This is foo. This is foo. This is foo. This is foo. This is foo. This is foo. This is bar. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo.
{textformat wrap=40 indent=4}
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is bar.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
{/textformat}
输出：
This is foo. This is foo. This is foo. This is foo. This is foo. This is foo. This is bar. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo.
{textformat wrap=40 indent=4 indent_first=4}
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is bar.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
{/textformat}
输出：
This is foo. This is foo. This is foo. This is foo. This is foo. This is foo. This is bar. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo.
{textformat style="email"}
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is foo.
This is bar.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
bar foo bar foo foo.
{/textformat}
输出：
This is foo. This is foo. This is foo. This is foo. This is foo. This is foo. This is bar. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo. bar foo bar foo foo.