Don't wrap long lines in literal blocks

Hi, thanks for this tool :)

We are trying to include some example mappings in the documentation:

```
" Phpactor does not assume any mappings automatically, the following mappings
" are available for you to copy: >
"
" augroup PhpactorMappings
" au!
" ...
" au FileType php nmap cc :PhpactorClassNew
" au FileType php nmap ee :PhpactorExtractExpression
" au FileType php vmap ee :PhpactorExtractExpression
" au FileType php vmap em :PhpactorExtractMethod
" augroup END
" <
```

But the longer lines wrap:

```
au FileType php nmap cc :PhpactorClassNew
au FileType php nmap ee
:PhpactorExtractExpression
au FileType php vmap ee
:PhpactorExtractExpression
au FileType php vmap em
:PhpactorExtractMethod
```

Is it / can it be possible to disable wrapping in `> <` blocks?