TL;DR:
{{ page.extra.tldr }}
{% macro content(page) %}
{%- set separator = config.extra.separator | default(value="•") -%}
{%- set rel_attributes = macros_rel_attributes::rel_attributes() | trim -%}
{%- if config.markdown.external_links_target_blank -%}
{%- set blank_target = "target=_blank" -%}
{%- else -%}
{%- set blank_target = "" -%}
{%- endif -%}
{{ page.extra.tldr }}TL;DR: