[ticket/11359] close span

PHPBB3-11359
[ticket/11359] add id attribute to textarea

PHPBB3-11359
[ticket/11359] html escape sphinx config data

PHPBB3-11359
Merge PR #1236 branch 'dhruvgoel92/ticket/11359' into develop

# By Dhruv
# Via Dhruv
* dhruvgoel92/ticket/11359:
  [ticket/11359] html escape sphinx config data
  [ticket/11359] add id attribute to textarea
  [ticket/11359] close span