{%- if site.debug.compress == false -%}
    {{ content }}
{%- else -%}
    {%- assign items = content | split: "<pre" -%}
    {%- for item in items -%}
        {%- assign block = item | split: "</pre>" -%}
        {%- assign block_after = block.last | split: " " | join: " " -%}
        {%- if block.size == 1 -%}
            {{ block_after }}
        {%- else -%}
            <pre{{ block.first }}</pre>{{ block_after }}
        {%- endif -%}
    {%- endfor -%}
{%- endif -%}