When the jinja2 template generates pages, a large number of blank lines and spaces will be generated. How to remove them? _html/css_WEB-ITnose

For example:

{% if xxx %}  # 空行 1something...{% endif %}   # 空行 2              # 空行 3{% if xxx %}  # 空行 4something...{% endif %}   # 空行 5              # 空行 6{% if xxx %}  # 空行 7something...{% endif %}   # 空行 8

Solution:

Add the "-" symbol to the block.
For example:
------
{%- if test -%}
{%- endif -%}