search-lunr.html sanitization error with backslashes

[agowa]

The current sanitizer doesn't handle backslashes correctly.

I've the following page source code:

{% highlight shell %}
do stuff "domain\username"
{% endhighlight %}

Using the current sanitizer in search-lunr.html it breaks lunr.
The fix is to add replace: '\','\\\\' to the document variable in search-lunr.html:

var documents = [{% for page in site.pages %}{% if page.url contains '.xml' or page.url contains 'assets' %}{% else %}{
    "id": {{ counter }},
    "url": "{{ site.url }}{{site.baseurl}}{{ page.url }}",
    "title": "{{ page.title }}",
    "body": "{{ page.content | markdownify | replace: '\','\\\\' | replace: '.', '. ' | replace: '</h2>', ': ' | replace: '</h3>', ': ' | replace: '</h4>', ': ' | replace: '</p>', ' ' | strip_html | strip_newlines | replace: '  ', ' ' | replace: '"', ' ' }}"{% assign counter = counter | plus: 1 %}
    }, {% endif %}{% endfor %}{% for page in site.without-plugin %}{
    "id": {{ counter }},
    "url": "{{ site.url }}{{site.baseurl}}{{ page.url }}",
    "title": "{{ page.title }}",
    "body": "{{ page.content | markdownify | replace: '\','\\\\' | replace: '.', '. ' | replace: '</h2>', ': ' | replace: '</h3>', ': ' | replace: '</h4>', ': ' | replace: '</p>', ' ' | strip_html | strip_newlines | replace: '  ', ' ' | replace: '"', ' ' }}"{% assign counter = counter | plus: 1 %}
    }, {% endfor %}{% for page in site.posts %}{
    "id": {{ counter }},
    "url": "{{ site.url }}{{site.baseurl}}{{ page.url }}",
    "title": "{{ page.title }}",
    "body": "{{ page.date | date: "%Y/%m/%d" }} - {{ page.content | markdownify | replace: '\','\\\\' | replace: '.', '. ' | replace: '</h2>', ': ' | replace: '</h3>', ': ' | replace: '</h4>', ': ' | replace: '</p>', ' ' | strip_html | strip_newlines | replace: '  ', ' ' | replace: '"', ' ' }}"{% assign counter = counter | plus: 1 %}
    }{% if forloop.last %}{% else %}, {% endif %}{% endfor %}];