caddy.rst compile warnings

[AdSchellevis]

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Describe the issue

Compile errors on make html:

source/manual/how-tos/caddy.rst:88: WARNING: Bullet list ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:88: ERROR: Unknown directive type "spacer".

.. spacer::
source/manual/how-tos/caddy.rst:89: WARNING: Explicit markup ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:90: WARNING: Bullet list ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:90: ERROR: Unknown directive type "spacer".

.. spacer::
source/manual/how-tos/caddy.rst:91: WARNING: Explicit markup ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:92: WARNING: Bullet list ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:92: ERROR: Unknown directive type "spacer".

.. spacer::
source/manual/how-tos/caddy.rst:93: WARNING: Explicit markup ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:94: WARNING: Bullet list ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:94: ERROR: Unknown directive type "spacer".

.. spacer::
source/manual/how-tos/caddy.rst:95: WARNING: Explicit markup ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:96: WARNING: Bullet list ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:96: ERROR: Unknown directive type "spacer".

.. spacer::
source/manual/how-tos/caddy.rst:97: WARNING: Explicit markup ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:98: WARNING: Bullet list ends without a blank line; unexpected unindent.
source/manual/how-tos/caddy.rst:98: ERROR: Unknown directive type "spacer".

.. spacer::
source/manual/how-tos/caddy.rst:99: WARNING: Explicit markup ends without a blank line; unexpected unindent.

Suggestions

I couldn't find the .. spacer:: clause, maybe it needs some plugin