Avoid extra blank output lines between consecutive vimscript examples

I noticed vimdoc outputs some ugly extra blank lines between consecutive vimscript examples if you have something like:
```vim
""
" Example: >
" call Foo()
" < >
" call Bar()
" <
```

Actual output:
```
Example: >
call Foo()
<

>
call Bar()
<
```

Expected output:
```
Example: >
call Foo()
< >
call Bar()
<
```

The vim helpfile syntax does seem to detect those correctly as code examples and highlight both.