Implement P() in RST. (Was missing until now.)

src/antsibull/jinja2/filters.py

@@ -218,6 +218,12 @@ def _rst_ify_module(m: 're.Match') -> str:
     return f"\\ :ref:`{rst_escape(fqcn)} <ansible_collections.{fqcn}_module>`\\ "
 
 
+def _rst_ify_plugin(m: 're.Match') -> str:
+    fqcn = f'{m.group(1)}.{m.group(2)}.{m.group(3)}'
+    plugin_type = m.group(4)
+    return f"\\ :ref:`{rst_escape(fqcn)} <ansible_collections.{fqcn}_{plugin_type}>`\\ "
+
+
 def _escape_url(url: str) -> str:
     # We include '<>[]{}' in safe to allow urls such as 'https://<HOST>:[PORT]/v{version}/' to
     # remain unmangled by percent encoding
@@ -280,6 +286,7 @@ def rst_ify(context: Context, text: str) -> str:
     text, _counts['italic'] = _ITALIC.subn(_rst_ify_italic, text)
     text, _counts['bold'] = _BOLD.subn(_rst_ify_bold, text)
     text, _counts['module'] = _MODULE.subn(_rst_ify_module, text)
+    text, _counts['plugin'] = _PLUGIN.subn(_rst_ify_plugin, text)
     text, _counts['link'] = _LINK.subn(_rst_ify_link, text)
     text, _counts['url'] = _URL.subn(_rst_ify_url, text)
     text, _counts['ref'] = _REF.subn(_rst_ify_ref, text)